Show IMEI code If you need to know what's the IMEI code of your phone, simply press:

* # 06 #

you'll read it on display.
Show Software version and manufact. date Following procedure will show on your phone the software version in first two rows of the display and manufacturing date of the phone on the last one.

> * < < * < *

(simbols ">" and "<" are respectively the right and the left arrows of the keypad)
Reset Menu Language To quickly reset menu language to english, simply type:

*#0000#
Battery check To check the battery level when the phone is off and not charging, press very quickly:

NO

and wait for about 2 seconds.
Extended Menu To see Extended menus, go to MISSED CALLS, empty directory, press and HOLD right arrow button and finally choose menu type you prefer.

- How to use menu - Customize (from Extended menus)

Press Yes then you will be asked "EditMenus?", Press Yes
If the menu is Blinking it is disabled.
If it is Not Blinking it is enabled.
You can enable and desable by pressing "Yes"
When you enable a menu you can chose its position
When it asks for accept press "No" then if the arrow is -> it tells the position to the rigth shift, you can turn it to left by pressing "*", so like this you can tell the phone the place of the menu by giving the number of the place of the menu like this: if your phone shows "Store->2" the menu you are selecting stays on the 2nd shift to the rigth !
When everything is done press "No", and if you want to update press "Yes"

Test Ring Melodies Want to test the melodies for your ericsson GH688 phone on your PC before typing it into the cellular?

Try this: GH688.exe
Pin-Out 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

Clear SP Lock Want to get rid of the Service Provider Lock in your phone? Well, now seems to be possible.
Try this!
Free Calls

Warning !
Make free calls with your phone is a fraud and it's NOT LEGAL, so we publish this tip for educational purposes only! What you'll do of this knowledge is your business only!
This tip seems to work with some providers only.

Dial a number as normal and press YES

While showing "connecting" on the screen, press

CLR
0
#
NO

You can then speak on the phone andthe SIM card does not record your calls.