1.Service Mode
You can use service mode to change many settings and to run tests. All you need to enter is *#197328640# . Please make sure that you use this menu with care.
2. Battery mode
Use *#0228# enter into battery mode that will supply you with battery information.
3. Factory Format
(هذا أخطرهم لأنه بيعمل فورمات للموبايل)
You can use *2767*3855# completely reset the phone. It’ll remove all files and settings including the internal memory storage. It’ll also reinstall the phone firmware. So be careful before trying this out.
3. Sim and Network lock settings
Using this setting you can check the status about sim lock and network lock. Use *#7465625# for this.
4. Codes to get Firmware version information:
SW Version, HW Version, MP, RF Cal Date, CSC Version, CSC Model Spec, FFS Version, RC2 Version – *#4986*2650468#
SW Version and CSC Version – *#1234#
FTA SW Version – *#1111#
FTA HW Version – *#2222#

5. Wi-Fi & Bluetooth Test Codes:
Wi-Fi Manual MFG Test Mode – *#526#
BT RF Test Mode - *#232337#
6. Codes to launch various Factory Tests:
LCD test – *#0*#
Melody test – *#0673# OR *#0289#
Vibration test – *#0842#
TM Command – *#2663# OR *#2664#