*#06# = IMEI International Mobile Equipment Identity
*#7780# or *#RSTO# = Reset Factory Setting
*#7705646# or *#OPROLOGO# = Remove Operator Logo
*#0000# = View Software Version
*#2820# or *#BTAO# = Bluetooth Address
*#746025625# or *#SIMOCLOCK# =Activate
Sim Clock Status
#pw+1234567890+1# = Show if Sim have Restriction
*#92702689# = Take you to a secret Menu where you may find some information below:
1. Display serial #.
2. Display the month and year of manufacture.
3. Display (if there) the date were the phone was purchased (MM/YY)
4. Display the date of the last repair - if found (0000).
5. Shows life timer of the phone (time passes since last start.
*#3370# or *#EFRO# = Enhance Full Rate Codec (EFR Activation) increase signal strength, better signal reception. It also help if you want to use GPRS in the service is not responding or too slow. Phone Battery will drain faster through.
*#3370* or *#EFRO* = EFR deactivation. Phone will automatically restart. Increase battery life by 30% because phone recieves less signal from network.
*#4720# or *#HRCO# = Half Rate Codec
*#4720* or *#HRCO* = Half Rate Codec deactivation. The phone will automatically restart.
*#7370925538# or *#RESOWALLET# = Reset wallet lock code, the depault wallet lock code is 12345.