google andriod secret code 3

*#*#34971539#*#*

This code is used to get information about phone camera. It shows following 4 menus:

• Update camera firmware in image (Don't try this option)
• Update camera firmware in SD card
• Get camera firmware version
• Get firmware update count

WARNING: Never use the first option otherwise your phone camera will stop working and you'll need to take your phone to service center to reinstall camera firmware.