If you are having problems with your Wi-Fi, type the code ##526## on the dial pad, it will scan and diagnose any problems with the WLAN connection. If you want to factory reset your phone, just dial this ##7780## code. It will remove everything stored on your device, but nothing that is stored on your external SD card. Want to get battery information, usage statistics and battery history, dial the code ##4636## and this will activates a screen that displays the information mentioned above. There are several such secret codes for your Android phone. To get full list of code, head over to this page.
