Ericsson GA628 Secrets Codes

Ericsson GA628

*#06# for checking the IMEI (International Mobile Equipment Identity)

*#0000# to reset the phones menu-language to English.

*#103# then YES Time and date will be shown.

>*<<*<* for checking the firmware revision information (software release) >*<<*<*> 1-row text strings. if pressing yes you can check the phones text programming in currently selected language. (298 entries)

>*<<*<*>> n-row text strings. if pressing yes you can check the phones text programming in currently selected language. (160 entries?)

The Service Provider (SP) Lock
The Service Provider (SP) Lock menu is used to lock the cell phone to the SP's SIM card. Once the cell phone is locked to a specific operator, if one inserts a SIM card from a different operator the phone will refuse to accept it! The cell phone will however accept another SIM card from the same operator.

To activate/deactivate this lock one needs a special secret code that is not available to the end user.

Here is how to activate the menu:

<**<> 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.

Free phone calls using the GA628
This trick has only been reported working on PREPAID GSM CARDS and in some countries and with some sw versions.

The prepaid GSM SIM CARD is a kind of "SIM card" which only has a sertant amount of credit on it (like a normal phonebox telecard)... if it can be traced? - we don't know...

Well..here's the trick you dial the no. normally and press YES. While "connecting" is shown on the screen, the following procedure should be carried out: Press CLR then 0 then # and then NO (twice) so as to switch OFF the phone. You can then still speak on the phone while it is switched off but the SIM card does not record your calls which will lead to FREE phone calls in some countries.. we hope!!

Another variant of the code
Make a Call, while the phone says Connecting type 083# (the position 83 must be empty! ), when phone says Pos Emtpy, press the NO key and turn off the phone.

If you can make the call with the phone turned off you will face a problem when you need to hang up the phone...the only way for you to do that is remove the battery...???

Main PCB rear:Here is 3 main section like Transmitter, receiver, and analogue/digital processing.The rightmost section contains the main processor, flash program memory (1MByte), working RAM (32Kbytes), plus the signal processing circuitry required to interface to the RF (transmitter and receiver) and analogue (speech) sections. The red device top-right is the SIM, a smartcard chip containing the user identity.
Main PCB front:8KByte memory device left-centre holds user's stored numbers and option settings. Gold pads on right half of board are keyboard contacts.
The Flash program memory is 128Kbytes - substantially less than the digital unit, which uses a great deal more software signal processing.
Now you can repair any kind of Ericsson GA628 phones using codes and see its main board.