*#06# Displays IMEI (Serial Number)
This page has been updated an re-written several times, most recently on 15 March 1996.
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 (most recent?)
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
FLASH - not sure, see below
INIT EEPROM MMI - not sure, sounds dangerous
Other, probably more recent version:
FLASH - will restart the phone, to the point of entering PIN numbers.
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) - CXC means firmware in Ericsson-speak. So the number is a version.
PRG - what is this for?
Available on the 951024 1054 software but apparently not on the 940810 1310, the sequence < * * < Responds "Lock to SP?" - an anonymous correspondent reports:" You can lock the phone to a specific operator, which means that if You put in a SIMM-card from a different operator, the phone refuses to accept it. To activate/deactivate this lock, you need a special secret code that is not available for the user. I think only the operator can get it from the phone manufacturer.
About a year ago, one of the swedish operators (Comviq) sold the Motorola Flare with this lock activated. To unlock the operator lock you had to buy the lockcode for about 1.000 SEK (~ $150), but if You wait 2 years after purchase date, You can get the code for free."
It seems that there is a number of different fun features available with different software versions. Please report which functions work with which software versions. I also believe there are other "secrets;" yet to be discovered. I would suggest playing around with key sequences, starting with sequences similar to the known ones, and then go on trying other sequences. Please report anything you find to me and I will report it on this page.