To check IMEI :
*#06#.To check the Software Version :
*#170602112302#.
If Imagine the cell battery is very low, and an important call is expected what to do there is a a reserve battery in the absence of the charger then to activate the key and recharge the cell again is to press "*3370#".
#3370#
To deactivate Enhanced Full Rate Codec( EFR).
