Ericsson GH688
Non rispondo per eventuali danni fatti al telefono o a persone come risultato dell'uso di uno qualsiasi di questi codici o procedure
 
 
 
 
 
 
 

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

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

>*<<*<* for checking the firmware revision information (software release) [info]

CXC125065            - Cell phone's internal product code.
PRG                         - Firmware revision (date & time stamp).
970715 1515
 
 

>*<<*<*> 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 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:

<**< Lock to Network? if pressing yes you have 5 attempts
to enter NCK.

<**<< Lock to Network subset? if pressing yes you have
5 attempts to enter NSCK.

Warning: Your phone can be locked to a service provider FOREVER by doing this!
If an invalid code is entered all five times, the menu will exit and be deactivated!
Any further attempt to activate the NCK/NSCK lock Menu will result in the response
"Not allowed"! However the NCK/NSCK lock can be recover through a direct clearing
in the EEPROM.
 

Software:

Newest Software version is:  <970905>

Fixes in Software version <970715>
- The bug of the missing arrow on display when all diverting active.
- Key lock key on display turned around , like in manual. (???)
- An updated GSM operators' list.
- Better and more solid reception.
- Changing problem when turned OFF.
 
 

Pin-outs:
The following information was mailed to me as seen underneath except for some minor changes.

1 = + external power supply
2 = RS232 input (TTL)
3 = GND (digital)
4 = RS232 output (TTL)
5 = +5V output
6 = Test
7 = Mute
8 = Internal/external
9 = GND (analogic)
10 = ?
11 = BF in
12 = BF out

Short description
1: it is for best external power supply, to charge the phone battery.
The external power supply alone without the phone battery DOES NOT switch on!
Suggested voltage 7.2V with 600mA at least.

2: The RS232 serial line input at TTL (0/5V) level.
When the phone is on, this pin is at "0", against any logic.
Connect your interface RS232/TTL even if its output is 1!!!

3: GND digital

4: It is the RS232 serial out put at level TTL (0/5V). When the
phone is switched on this pin is at 1 (this seems logical!).

5: +5V output with phone on. Usable provided that few mA are absorbed.

6: Mode test. As a general rule is at 0. To switch in test mode, switch the
cellular off, set the pin at 1 (+5V), switch the phone on.In this mode the serial
line works at 115200 instead of the standard 9600.

7: Mute. Normally at 0, it goes at 1 while scrolling or during a conversation.
Useful to mute the possible ear breaking radio!

8: if open, the internal microphone and loudspeaker are on. If at 0, the external
ones are enabled.

9: GND analogic

10: The function of this pin is a mystery. It seems like a microphone and
loudspeaker attenuates when at 0.

11: BF in

12: BF out