To view IMEI number *#06#

The Latest Software Version is under Phone Info.

To view Software Version enter -> * <- <- * <- * CLR (Use with Care)

To view IMEI number *#06#

To view Software Version enter -> * <- <- * <- * CLR (Use with Care)

To activate operator lock <- * * <- (This locks the phone to one carriers SIM card - Use with lots of care)
Press Yes to lock and No to notlock. You can also use the codes below to undo this function. USE AT OWN RISK

I have tested the function Lock to SP... At least on the 337 there's a submenu: Enter SPCK-code. There are 5 attempts, which is showed (05 attempts). At final attempt the phone beeps as a warning, 'this is the final try', when entering the menu... Wrong code exits the menu, so you are not stuck in something... When you have tried to enter the code (wrong) all five times, the menu is deactivated, and you'll get: 'Not allowed' when entering <-**<-

 A "secret test mode" can be accessed on the GH337. There seems to be two methods:

> * < < * > * displays software version, such as 940810 1310

> * < < * < * displays software version, such as 951024 1054

After entering this mode, the < and > keys scroll through a menu. There seems to be different menus for different versions of software.

Software version number are apparently a date and time stamp.

940810 1310 version commands:

TEXT CHECK - shows 254 messages in current language

INIT EEPROM MMI - resents NVRAM settings (User Settings).

Other, probably more recent version:

FLASH - will restart the phone, to the point of entering PIN numbers.You can't kill a 337 when pressing YES while it says "FLASH?", you must connect it to 5/12 volts first to be able to erase the flash-memory.

1-ROW TEXTS - scroll through 174 single line text messages with < and >

n-ROW-TEXTS - scroll through full-screen messages with < and >

950626 1405 version commands:

CXC (number) - The Application software's "product number". The GH337/GF337 is always "CXC 125 005"

PRG - Indication for Programming

To quickly reset menu language to English, simply type:

*#0000#

To see the Full Network Name:

Go to the Network menu

when the phone displays the networks available press

*

and it will show the full name.

---------------------

Pin-Outs: Bottom view, keyboard up,
counting from the right

1 = + external power supply (7.2Volt - 600mA)
2 = RS232 input (TTL)
3 = GND (digital)
4 = RS232 output (TTL)
5 = +5V output
6 = Test (0=Normal - 1=test mode)
7 = Mute
8 = Internal/external mic and ear (0=External - open=Internal)
9 = GND (analogic)
10 = ?
11 = BF in
12 = BF out

-----------

To check the phone's software (firmware revision information) type:

>*<<*<*

For shortcut for Last Dialed call menu type: 0#

To check the battery level when the phone is off and not charging, press very quickly NO and wait for 2 secs.

To see the Full Network Name: Go to the Network menu, when the phone displays the networks available press * and it will show the full name.

To view the full operator list: Go to the 'Edit list' menu under 'networks'. The phone says 'please wait'. When finished, Press the < key once, then YES twice. Now the full list show be displayed. Browse through the list using the < > keys.

Pinout of the GA628. Bottom view, keyboard up, counting from the right:

1: Charger plus.

2: Serial input.

3: GND

4: Serial output. Debug messages appear here at 112KBaud when in debug mode.

5: +5V out ? Sources over 100mA.

6: Digital Input. Phone enters debugmode when tied to +5V at power-up.

7: Digital output. High when calling. Could be off-hook signal.

8: Enable external mike and speaker, connect to GND to do so.

9: GND

10: Enable external mike and speaker, connect to GND to do so.

11: External microphone.

12: External speaker, very small signal (10 mV)

All signals seem to be at 5V logic. Most debug messages are text. Like "CB ok!" etc. Debug messages are trailed by 0x0A, 0x0D. Power-up means removal of battery, reconnection of battery, depressure of "NO".

Command set

The following commands are recognised:

AT+GMI  Manufacturer identification
AT+GMO  Request model Identification
AT+GMR  Request revision Identification
AT+GMM
ATDxxx; Dial number xxx (note the semicolon (;))
ATH     Hangup phone
AT+CFUN=? Define levels of fuctionality in the order of power consumed
AT+CBC  Query battery level

Interfacing circuitry

TTL signal levels are use on the data pins of the GA628. Probably the easiest way to generate TTL signals outof a serial port is by removing the RS232 levelshifters (1488 1489 or alike) from the serial board inside your computer !

Hidden menus
Go to MissedCall
Empty the list
Press the -> key for a second or two
The option Menu size turns up
Choose 'yes' and go from there.

An alarm clock turned up too but it never rang. I think this was
because there is no clock in the phone.


Try to type this in your Ericsson:
>*<<*<*
where < is the left arrow and > is the right one

To quickly reset menu language to English, simply type:

*#0000#

To see the Full Network Name:

Go to the Network menu

when the phone displays the networks available press

*

and it will show the full name.

Pin-Outs: Bottom view, keyboard up, counting from the right

1 = + external power supply (7.2Volt - 600mA)
2 = RS232 input (TTL)
3 = GND (digital)
4 = RS232 output (TTL)
5 = +5V output
6 = Test (0=Normal - 1=test mode)
7 = Mute
8 = Internal/external mic and ear (0=External - open=Internal)
9 = GND (analogic)
10 = ?
11 = BF in
12 = BF out

To check the phone's software (firmware revision information) type:

>*<<*<*

• The Ericsson GF768 Cellular phone connector.

• The "pins" of the contact on the back of the GF768, are numbered 1 to 12 from left to right, when you look at the bottom of the GF768, holding it with the keys up and the back down.