Hello Sweet Friends And Guests.
Here are some of the tricks on your Android Operating System/ android OS cellphone.
Please note: Some codes mentioned here can be dangerous
General :
*#*#4636#*#* - Phone / Battery / USage information
*#*#7780#*#* - factory data reset
*2767*3855# - factory format
*#*#34971539#*#* - information about phone camera
*#*#7594#*#* - End Call / Power
*#*#273283*255*663282*#*#* - File copy / backup
*#*#197328640#*#* - Service mode.
WLAN, GPS and Bluetooth Test Codes:
*#*#232339#*#* OR *#*#526#*#* OR *#*#528#*#* - WLAN test (Use "Menu" button to start various tests)
*#*#232338#*#* - Shows WiFi MAC address
*#*#1472365#*#* - GPS test
*#*#1575#*#* - Another GPS test
*#*#232331#*#* - Bluetooth test
*#*#232337#*# - Shows Bluetooth device address
*#*#8255#*#* - This code can be used to launch GTalk Service Monitor.
GET FIRMWARE VERSION INFORMATION:
*#*#4986*2650468#*#* - PDA, Phone, H/W, RFCallDate
*#*#1234#*#* - PDA and Phone
*#*#1111#*#* - FTA SW Version
*#*#2222#*#* - FTA HW Version
*#*#44336#*#* - PDA, Phone, CSC, Build Time, Changelist number
CODES TO LAUNCH VARIOUS FACTORY TESTS:
*#*#0283#*#* - Packet Loopback
*#*#0*#*#* - LCD test
*#*#0673#*#* OR *#*#0289#*#* - Melody test
*#*#0842#*#* - Device test (Vibration test and BackLight test)
*#*#2663#*#* - Touch screen version
*#*#2664#*#* - Touch screen test
*#*#0588#*#* - Proximity sensor test
*#*#3264#*#* - RAM version