Appears when Quiet Mode, Silent All is active. Appears when Quiet Mode, Vibration All is active. Shows the level of your battery. The more bars you see, the more power you have remaining. Bluetooth feature is active. Indicates that a microSD card is inserted in the handset.
Selecting Functions and Options
Your phone offers a set of functions that can be customized for your ease and specific needs. These functions are arranged in menus and sub-menus, accessed using the two soft keys. Each menu and sub-menu allows you to view and alter the settings of a particular function. In some functions, you may be asked for a password or PIN. Enter the code and press the OK soft key or the key. When you access a list of options, your phone highlights the currently active option. If, however, there are only two options, such as On/Off or Enable/Disable, your phone highlights the option that is not currently active, so that you can select it directly.

Selecting Options

To view the various functions and options available and to select the one you want:
Press the appropriate soft key. To select the function displayed or the option highlighted, press the Select soft key or the key. To view the next function or highlight the next option on a list, press the Down key or the key on the left side of the phone. To move back to the previous function or option on a list, press the Up key or the key on the left side of the phone. To move back up one level in the menu structure, press the Left navigation key or the Back soft key. To exit the menu structure without changing the settings, press the key.

Command Keys

Functions for the soft keys are defined by what appears above each in the display. There are two soft keys, the left soft key and the right soft key.

Soft Keys

The roles of the soft keys vary depending on the function you are currently using; the labels on the bottom line of the display just above each key indicate their current role.

Section 4: Menu Navigation 35
4: Sound 5: About * : Reset Settings # : Phone Information
* Shows only if supported by your SIM card. **The IM menu settings are predicated by the Choose Your Community Setting *** Shows if you have a microSD card inserted.

Section 5: Entering Text

Topics Covered Changing the Text Input Mode Using T9 Mode Using Alphabet Mode Using Symbols Using Numbers
This section outlines how to select the desired text input mode when entering characters into your phone. This section also describes how to use the T9 predictive text entry system to reduce the amount of key strokes associated with entering text.
Changing the Text Input Mode
The Text Input option switches the key entry functions from T9 Mode, ABC Mode, Numeric Mode, and Symbols Mode.

T9 Mode

This mode allows you to enter words with only one keystroke per letter. Each key on the keypad has more than one letter; for example, pressing the 5 key can enter J, K, or L. However, the T9 mode automatically compares the series of keystrokes you make with an internal linguistic dictionary to determine the most likely word, thus requiring far fewer keystrokes than the traditional Alphabet mode.
Alphabet Mode This mode allows you to enter letters by pressing the key labeled with the letter you want. Press the key once, twice, three, or four times until it displays. Numeric Mode This mode allows you to enter numbers. Symbols Mode This mode allows you to enter symbols, such as punctuation marks.
When you are in a field that allows characters to be entered, you will notice the text input mode indicator on the display.
1. To change the text input mode, press the 2. Choose from the following options:
: Alphabet mode : Numeric mode : T9 mode
Note: In Alphabet mode press and hold the key to access and exit T9 mode.

: Symbol mode

Note: Press and hold the key to access Symbol mode. Press the number key corresponding to the symbol you want to enter. Use the Up and Down navigation keys to scroll through the available symbols. Press the Back soft key to exit.

Using T9 Mode

T9 Predictive Text input mode is based on a built-in dictionary.

4. Once you have found the entry, press the
key to dial the number, or press the Options soft key to access the Address Book entry options.
Using Address Book Entry Options
While accessing any Address Book entry, press the Options soft key to use the options for the entry. The following options are available:
View: allows you to view details for the address book entry. Send Message: allows you to send a text or multimedia message to the address book entry. Add New Contact: allows you to add a new entry to the address book. Choose Phone or SIM storage location. Delete: allows you to delete the Selected or All phone book entries.

Adding a New Contact

Storing a Number in the Phones Memory
1. When the Idle screen displays, press the Menu soft key. 2. Highlight Address Book, press the Select soft key or the
3. Scroll to Add New Contact by pressing the Up or Down key and press the

Select soft key or the

4. Select Phone and press the Select soft key or the
5. Enter the New Contact information. The following entries are available:
Name (First Name/Last Name): allows you to enter a first name and a last name for the number entered. Mobile: assigns the number entered to the Mobile entry. Home: assigns the number entered to the Home entry. Office: assigns the number entered to the Office entry. Fax: assigns the number entered to the Fax entry. Other: allows you to enter additional numbers for the entry. Email: allows you to enter an e-mail address for the contact. Graphic: allows you to assign a caller ID image to the number you have entered. Press the key to display graphic menu. Choose from the following options: Take a Photo: launches the camera. Photos: launches the Photos menu to choose from previously taken photos. Downloaded Graphics: assign a graphic that you have previously downloaded.
Favorite Graphics: assign a graphic that you have saved to the favorite graphics folder. Default Graphics: assign a default (system delivered) graphic. None: no graphic assigned to this contact entry.
Ringtone: allows you to assign a melody to the number contact entry. Press the key to display ringtone menu. Choose from the following:
Default Sounds: assign a default (system delivered) ringtone. Downloaded Sounds: assign a ringtone that you have previously downloaded. Favorite Sounds: assign a ringtone graphic that you have saved to the favorite sounds folder. Music: launches the Music List to select from music files saved. None: no sounds are assigned to this contact entry. Group: allows you to assign an existing or create a new group entry to the
number entered. Press the key to display groups. Press the Option soft key to Select or Add a new group. Memo: allows you to enter memos associated with the number entered.
6. Press the Save soft key or the

5. Choose from the following options: Add: allows you to add from the Contact List or FDN List. Remove: allows you to remove a speed dial entry. 6. Select Add from the Speed Dial options menu and press the Select soft key

or press the key.

7. Select the entry you would like to add and press the Select soft key or the 8. The entry is saved and the name displays in the Speed Dial memory

location.

Changing a Number Assigned to a Key
4. Select the memory location you would like to change. 5. Press the Options soft key, select Change and press the Select soft key or
key. key. key to return to Idle mode.
6. Use the navigation keys to select the new speed dial entry to assign and
press the Select soft key or the
7. When you are finished, press the
Deleting Speed Dial Entries
3. Scroll to Speed Dial by pressing the Up or Down Navigation key, press the
key. key, select Remove and press the
4. Select the number assigned key you want to remove. 5. Press the Options soft key or the
key. key to return to Idle mode.
6. Press the Yes soft key to confirm removal. 7. When you are finished, press the

My Name Card

The Name Card option is your contact information. You can attach your Name Card to a text, multimedia, or Bluetooth device. To create your name card, use the following steps:
3. Scroll to My Name Card by pressing the Up or Down Navigation key, press
the Select soft key or the
5. Press the Save soft key or the
4. The My Name Card screen displays. Enter your contact information. 6. Press the Options soft key to access the following options: Edit: allows you to edit the my name card entry.
Send Via: allows you to send your name card in a text message, a multimedia message, or to a Bluetooth device. Exchange Name Card: allows you to search for Bluetooth devices and if desired, to send the My Name Card information. Remove: deletes the My Name Card entry.
Finding My Own Phone Number
This function is a memory aid, which you can use to check your own phone number if you need to do so. You can assign a name to each of your own phone numbers registered on your SIM card. You can also edit the names and numbers. Any changes made here do not in any affect the actual subscriber numbers on your SIM card.

6. Select Send Message and press the Select soft key or the
key. Continue to the next step. Alternatively, select Save Message to to save the message in the Drafts folder. After saving the message, the display returns to the My Messages menu list. destinations, press the Down Navigation key after entering a number and repeat this step.
7. Enter a destination number. If you want to send the message to multiple
8. When you have finished entering destination numbers, press the Options
soft key. The following options display: Send: allows you to send the message. Recent Recipient: allows you to view a list of previous recipients destination numbers. Address Book: allows you to add recipients to your Address Book. Group: allows you to create and add a new group. Save to: save the message in the Drafts folder or a folder you have created in the My Folder option. Delete Destination: allows you to delete the destination number.
9. Select Send and press the Select soft key or the

key to send message.

Note: When you write a text message, the phone automatically splits it into several messages if your message exceeds the maximum number of characters allowed for sending. The number of split messages to be sent is shown each time your message is split. Depending on your service provider, the maximum number of characters may vary.

Multimedia Messages

key. Using the Up or Down Navigation key, highlight Create New Message and press the Select soft key or the key. key.
3. Highlight Multimedia Message and press the Select soft key or the 4. Using the Up or Down Navigation key, highlight a message content option

and press the

Alternatively highlight the message content option, press the Options soft key. The following options display: Subject Add: allows you to enter subject text. Preview: allows you to preview your messages before sending. Send: allows you to send the message Save to: saves the message to Drafts folder or a folder you have created in the My
Folder option. Settings: allows you to select a Delivery Report, Read Reply, Priority, Expiry Date, and Delivery Time. Add Page: allows you to add additional pages to your message. Delete Page: deletes a page from your message. Edit Page: allows you to change the page duration (more or less pages) or to edit the order of the pages. Attach: allows you to attach a Name Card, a Schedule, an Anniversary, a Miscellaneous item or Task to your message. 5. Select Add, press the Select soft key or the

Message Tone

This menu allows you to select how the phone informs you that a new SMS,MMS, or Broadcast message has been received. For each message tone, the following options are available: Tone: you can select a message tone. Mode: you can select a type of message alert. Off: the phone does not use the SMS tone. Tone: the phone sounds the selected message tone. Vibration: the phone vibrates. Repetition: you can select how often the phone informs you of a new message. Once: the phone alerts you to a new message just once at the time of its receipt. Every 2 Min.: the phone alerts you one time to a new message every 2 minutes until you open the message. Press the Left or Right Navigation key to make selection Press the Save soft key or the key to save changes.

Power On/Off

This menu allows you to select the melody that the phone sounds when it is switched on and off. Press the Up or Down Navigation key to make selection Press the Select soft key or the To turn off the sound, select Off. key to save changes.

Slide Tone

This menu allows you to select the melody that the phone sounds when the slide is being opened. Press the Up or Down Navigation key to make selection Press the Select soft key or the To turn off the sound, select Off. key to save changes.
This menu item allows you to select what mode your phone will go in when you press and hold the key. You can choose Vibration All or Silent All. When Vibration All is selected your phone will only vibrate. When Silent All is selected your phone will not make a sound or vibrate. Press the Up or Down Navigation key to make selection Press the Select soft key or the key to save changes

Extra Tones

You can customize additional tones for the phone.
1. To turn a given tone on, press the
key. A check mark displays in front of key. The check mark no longer

the option.

2. To turn a given tone off, press the
displays in front of the option. The following options are available:
Error Tone: this menu allows you to choose whether or not the phone sound when you perform an improper function. Minute Minder: sets whether or not the phone beeps every minute during an outgoing call to keep you informed of the length of your call. Connection Tone: sets whether or not the phone to beep when your call is connected to the system. Alerts on Call: This menu allows you to choose whether or not the phone informs you when you receive a new message or when the time for an alarm comes during a call.

Display Settings

In this menu, you can change various settings for the display or backlight.

The Security feature enables you to restrict the use of your phone by the others and to restrict the types of calls. Various codes and passwords are used to protect the features of your phone.
1. In Idle mode, press the Menu soft key to access Menu mode. 2. Select Settings and press the Select soft key or the 3. Select Security and press the Select soft key or the

PIN Check

When the PIN Check feature is enabled, you must enter your PIN each time you switch on the phone. Consequently, any person who does not have your PIN cannot use your phone without your approval.
Note: Before disabling the PIN Check feature, you must enter your PIN.
Disable: the phone connects directly to the network when you switch it on. Enable: you must enter the PIN each time the phone is switched on.

Change PIN

This feature allows you to change your current PIN, provided that the PIN Check feature is enabled. You must enter the current PIN before you can specify a new one. Once you have entered a new PIN, you are asked to confirm it by entering it again.

Phone Lock

When the Phone lock feature is enabled, the phone is locked and you must enter the 4- to 8-digit phone password each time the phone is switched on. The password is preset to 00000000 at the factory. To change the phone password, see "Change Password" on page 78. Once the correct password has been entered, you can use the phone until you switch it off. The following options are available:
Disable: you are not asked to enter the phone password when you switch on the phone. Enable: you are required to enter the phone password when you switch on the phone.

Change Password

The Change Password feature allows you to change your current phone password to a new one. You must enter the current password before you can specify a new one. The password is preset to 00000000 at the factory. Once you have entered a new password, you are asked to confirm it by entering it again.

Privacy

Using this menu, you can lock your phone and its contents. Once you have locked the contents, you must enter the phones password to access the associated menus. The password is preset to 00000000 at the factory.

SIM Lock

When the SIM Lock feature is enabled, your phone only works with the current SIM. You must enter the SIM lock code to unlock the SIM so you can use a different SIM card. Once you have entered the lock code, you are asked to confirm your password. Reenter your password and press the OK soft key.

Software Update

Software Update allows your wireless provider to automatically install high-priority updates on your handset.
Voice Command Settings Choice Lists
If VoiceSignal is not absolutely confident that it has correctly identified a name or number, it can display a choice list of up to three possibilities, and prompt you to confirm the correct one.
You can control when choice lists appear by changing the Choice Lists setting to Automatic, Always On, or Always Off.
Automatic: VoiceSignal displays a choice list when it is not confident it has identified the correct choice from among multiple alternatives. Always On: When there are multiple alternatives, VoiceSignal always displays a choice list. Always Off: VoiceSignal never displays a choice list. Instead, the application picks the best from among the possible choices.

Sensitivity

In VoiceSignal, "sensitivity" controls the balance between rejecting too much, which means the phone frequently does not recognize names, numbers, or commands, and rejecting too little, which means it frequently recognizes something even if nothing was said. When VoiceSignal rejects an utterance, it displays a message such as "Please repeat" or "No match found." If you frequently experience these messages, you might be able to get better recognition by adjusting the Sensitivity setting toward Reject Less. If you frequently experience false activations (VoiceSignal detects a wrong match), you might be able to get better performance by adjusting the Sensitivity setting toward Reject More.

Digit Dialing

Use the Digit Dialing menu to adapt digit dialing to your voice.
Adapt Digits: Lets you adapt digits, which can improve voice recognition of phone numbers. Adaptation takes about 60 seconds. Reset Digits: Erases any digit adaptation you have done and resets digit recognition to the factory default. If you have not adapted digits, this option is grayed out.
You can customize the VoiceSignal user interface by turning playback on or off for prompts, names, and numbers. You can also change the speed and volume of name playback.

Memory Card: launches the memory card list. Highligt a file and press the
The Games menu option allows you to shop games using the WAP browser. You can download a new game, and save it to the My Games folder. To access the Games menu option, use the following steps:
3. Highlight the Games menu and press the Select soft key. Then you can
enter into the Games menu
4. To download new games, select the Shop Games menu. 5. To enjoy pre-loaded games, enter into My Games menu then choose one

Applications

In the Applications menu you can access the MP3 Player, Camera, Voice Command, Alarm, Calendar, Task, Note, Tools and Record Audio.

MP3 Player

Note: Optional Accessories required. See Cingular store for more details or visit www.samsung.com.
Note: Samsung PC Studio software (optional accessory) and the d807 only recognize MP3, AAC, and AAC+, formats. If you want to play music from the CD or other source, you will first have to convert it to one of these formats via the media player of your choice.
The MP3 Player menu option allows you to play the music files saved to your Audio file or Memory card. Use the following procedures to access the MP3 Player.
3. Highlight the Applications menu and press the Select soft key. MP3
Player is highlighted. Press the Select soft key.
4. Press the Options soft key. The following options are displayed: Add Music From: allows you to add the music files from the Phone or Memory Card. Settings: allows you to change these settings: Repeat Mode: choose from Off, Repeat One, Repeat All. Shuffle: choose from Off or On. Visualization: choose from Type 1 or Type 2. Backlight: choose from Always On or Normal. Volume: choose the volume for the music file to be played. 5. Press the key to play the music file.
Note: The MP3 Player can only play MP3 files recorded at 192 kbps or less. Please consult the recorded source file for details.

Using the Camera

Use the following steps to take photos and select settings.

Taking Photos

Note: When taking a photo in direct sunlight or in bright conditions, shadows may appear on the photo.
1. In Idle mode, press the Menu 88
soft key to access Menu mode. Use the Navigation keys to highlight My Stuff and press the Select soft
2. Use the Up or Down Navigation key to highlight Applications and press the
Select soft key or the key. Highlight Camera and press the Select soft key or the key. Alternatively, in Idle mode, press the Camera soft key to turn on the camera. Adjust the image by aiming the camera at the subject.

key to take the photo.

Note: Your camera produces photos in JPEG format.

2. Say "Go To" or
Say "Go To" followed by the application you want to open or Say "Go To" followed by a menu item. Examples: Go To (To see a list of applications you can open) Go To Calendar

Hints for using Go To

Wait for the beep before saying the command.
To see a list of applications/menu items you can open, say "Go To" but do not specify a destination. VoiceSignal displays a list of valid destinations and prompts you with "Please Choose." You can then say the name of the application you want to open. If the list is too long to fit on one screen, the screen will contain the choice "Next Menu." You can say one of the application or menu names on the list, or say "Next Menu" to view the next screen
This feature allows you to: set the alarm to ring at a specific time. set the phone to switch on automatically and ring the alarm even if the phone is switched off. To set the alarm:
1. In Idle mode, press the Menu soft key to access the menu mode. 2. Select My Stuff and press the Select soft key or the
key. Using the Up or Down Navigation key, highlight Applications and press the Select soft key or the key. key. The following options display:
3. Highlight Alarm and press the Select soft key or the
Wake-up Call: the alarm rings to wake you up at the specified time. Alarm 1: primary alarm setting. Alarm 2: secondary alarm setting. Auto Power: the alarm rings even when the phone is turned off. 100
4. Select an alarm type and press the Select soft key or the
key. Set the following options: Alarm: use the Left or Right Navigation key to turn alarm on or off.
Note: Your phone is preset to a 12-hour format. To change the time format, see "Time & Date Settings" on page 70.
Alarm Time: use the alphanumeric keypad enter a time for the alarm to sound. AM/PM: use the Left or Right Navigation key to select AM or PM. Repeat: use the Left or Right Navigation key to select alarm frequency. Alarm Tone: press the key, select Downloads, Favorites, or Defaults alarm tones. Press the Select soft key or the key to select a tone. 5. Press the Save soft key to save changes.
Note: To stop the alarm when it rings, open the phone and press any key.

Note: Press

Confirm to turn off the alarm, press Snooze

What is FDA doing to find out more about the possible health effects of wireless phone RF?
FDA is working with the U.S. National Toxicology Program and with groups of investigators around the world to ensure that high priority animal studies are conducted to address important questions about the effects of exposure to radio frequency energy (RF). FDA has been a leading participant in the World Health Organization international Electromagnetic Fields (EMF) Project since its inception in 1996. An influential result of this work has been the development of a detailed agenda of research needs that has driven the establishment of new research programs around the world. The Project has also helped develop a series of public information documents on EMF issues. FDA and Cellular Telecommunications & Internet Association (CTIA) have a formal Cooperative Research and Development Agreement (CRADA) to do research on wireless phone safety. FDA provides the scientific oversight, obtaining input from experts in government, industry, and academic organizations. CTIA-funded research is conducted through contracts to independent investigators. The initial research will include both laboratory studies and studies of wireless phone users. The CRADA will also include a broad assessment of additional research needs in the context of the latest research developments around the world.
What steps can I take to reduce my exposure to radio frequency energy from my wireless phone?
If there is a risk from these products - and at this point we do not know that there is - it is probably very small. But if you are concerned about avoiding even potential risks, you can take a few simple steps to minimize your exposure to radio frequency energy (RF). Since time is a key factor in how much exposure a person receives, reducing the amount of time spent using a wireless phone will reduce RF exposure.
If you must conduct extended conversations by wireless phone every day, you could place more distance between your body and the source of the RF, since the exposure level drops off dramatically with distance. For example, you could use a headset and carry the wireless phone away from your body or use a wireless phone connected to a remote antenna.
Again, the scientific data do not demonstrate that wireless phones are harmful. But if you are concerned about the RF exposure from these products, you can use measures like those described above to reduce your RF exposure from wireless phone use.
What about children using wireless phones?
The scientific evidence does not show a danger to users of wireless phones, including children and teenagers. If you want to take steps to lower exposure to radio frequency energy (RF), the measures described above would apply to children and teenagers using wireless phones. Reducing the time of wireless phone use and increasing the distance between the user and the RF source will reduce RF exposure. Some groups sponsored by other national governments have advised that children be discouraged from using wireless phones at all. For example, the government in the United Kingdom distributed leaflets containing such a recommendation in December 2000. They noted that no evidence exists that using a wireless phone causes brain tumors or other ill effects. Their recommendation to limit wireless phone use by children was strictly precautionary; it was not based on scientific evidence that any health hazard exists.

Additional information on the safety of RF exposures from various sources can be obtained from the following organizations:

FCC RF Safety Program:

http://www.fcc.gov/oet/rfsafety/
Environmental Protection Agency (EPA):
http://www.epa.gov/radiation/
Occupational Safety and Health Administration's (OSHA):
http://www.osha.gov/SLTC/radiofrequencyradiation/index.html
National institute for Occupational Safety and Health (NIOSH):
http://www.cdc.gov/niosh/topics/emf/
World health Organization (WHO):
http://www.who.int/peh-emf/
International Commission on Non-Ionizing Radiation Protection:

http://www.icnirp.de

National Radiation Protection Board (UK):

http://www.nrpb.org.uk

US food and Drug Administration
http://www.fda.gov/cellphones

Road Safety

Your wireless phone gives you the powerful ability to communicate by voice, almost anywhere, anytime. But an important responsibility accompanies the benefits of wireless phones, one that every user must uphold. When driving a car, driving is your first responsibility. When using your wireless phone behind the wheel of a car, practice good common sense and remember the following tips:
1. Get to know your wireless phone and its features, such as speed dial and
redial. If available, these features help you to place your call without taking your attention off the road.
2. When available, use a hands-free device. If possible, add an additional
layer of convenience and safety to your wireless phone with one of the many hands free accessories available today.
3. Position your wireless phone within easy reach. Be able to access your
wireless phone without removing your eyes from the road. If you get an incoming call at an inconvenient time, let your voice mail answer it for you.
4. Let the person you are speaking with know you are driving; if necessary,
suspend the call in heavy traffic or hazardous weather conditions. Rain, sleet, snow, ice and even heavy traffic can be hazardous.
Section 12: Health and Safety Information 123

OR SUPPLIER OF SUCH THIRD-PARTY SOFTWARE OR EQUIPMENT, AS THE CASE MAY BE. This Limited Warranty allocates risk of Product failure between Purchaser and SAMSUNG, and SAMSUNG's Product pricing reflects this allocation of risk and the limitations of liability contained in this Limited Warranty. The agents, employees, distributors, and dealers of SAMSUNG are not authorized to make modifications to this Limited Warranty, or make additional warranties binding on SAMSUNG. Accordingly, additional statements such as dealer advertising or presentation, whether oral or written, do not constitute warranties by SAMSUNG and should not be relied upon. Samsung Telecommunications America, L.P. 1301 East Lookout Drive Richardson, Texas 75082 Phone: 1-800-SAMSUNG Phone: 1-888-987-HELP (4357) 2006 Samsung Telecommunications America, L.P. All rights reserved. No reproduction in whole or in part allowed without prior written approval. Specifications and availability subject to change without notice. Printed in Korea
Accessing a Menu Function 29 Address Book Searching for a Number 27 Alerts on Call 68 Alphabet mode 37 Applications 87 Audio 83 Audio List 108
Dialing a Number Address Book 41 Display icons 18 Display Settings 73
End key 20 Ending a Call 23 Entering Text 37 Changing the Text Entry Mode 37 Using Alphabet Mode 39 Using Numbers 40 Using Symbols 40 Using T9 Mode 38
Battery charging 10 installing 9 low indicator 12 removing 7

Functions and Options 19

Call Functions 22 Adjusting the Call Volume
Games 87 Getting Started 7 Activating Your Phone 7 Voicemail 13 Graphics 85 Greeting Message 71
Answering a Call 24 Correcting the Number 22 Making a Call 22 Quiet Mode 25 Recent Calls 24 Redialing Last Number 23 Call Waiting Camera 88 Taking Pictures 88 camera options 89 Charging battery 10 Clear key 20 Command Keys 20 Converter 106
Health and Safety Information 116
Icons, description 18 Idle Screen Setting 70 Installing microSD Card 11 International Call 22

Keypad Tone 67

Left soft key 20

Low battery indicator 12

phone 12
Making a Call Address Book 23 Memory Card 109 Menu Navigation 29 Menu Outline 30 Messaging 51 Types of Messages 52 mircroSD Card 11 Missed Call Deleting 25 Viewing 24 Mobile Email Options 52 MP3 Player 88 Multimedia Files Downloading 113 Music 87 Mute 27