Android mobiles are well known for their secret features. Here are some of the android secret codes which are used to perform various actions. These codes were tested on Samsung Galaxy Ace (S 5830), Samsung Galaxy Pop (S 5570), Samsung Galaxy S II, Sony Xperia Sola (MT27i) and HTC Wildfire S. Some codes might work on other mobiles. Hardware/Software/Network *#*0*# – general test *#*#0*#*#* – LCD test *#*#0283#*#* – Packet Loopback test *#*#0289#*# * – Audio test *#*#0588#*#* – Proximity sensor test *#06# – Display IMEI number *#*#0673#*#* – Audio test *#07# – Test History *#*#0842#*#* – Vibration test and Backlight test *#*#1234#*#* – Display current firmware *#*#232338#*#* – Shows Wifi MAC address *#*#232339#*#* - Wifi Test *#*#273283*255*663282*#*#* – For a quick Backup of all Media Files *2767*4387264636# – To display product code *#*#3264#*#* – RAM version *#*#34971539#*#* – Show complete information about camera *#*#44336#*#* – PDA, Phone, CSC, Build Time, Change list number *#*#4986*2650468#*#* – PDA, Phone, H/W, RF Call Date *#*#526#*#* – WLAN Test *#*#7262626#*#*– Field test *#7465625# – View Phone Lock Status *7465625*782*# – Configure Network Lock NSP *7465625*27*# – Insert Network Lock Keycode NSP/CP #7465625*27*# – Insert Content Provider Keycode #7465625*782*# – Insert Partial Network Lock Keycode *7465625*77*# – Insert Network Lock Keycode SP #7465625*77*# – Insert Operator Lock Keycode *7465625*638*# – Configure Network Lock MCC/MNC #7465625*638*# – Insert Network Lock Keycode *#*#7594#*#* – Change the power button behaviour *#*#8255#*#* – GTalk Service Monitor Version Details/Information *#*#4636#*#* – Phone Information *#12580*369# – Software & Hardware Information *#*#2222#*#* – FTA Hardware Version *#*#1111#*#* – FTA Software Version Unlock PUK code in Emergency Dial **05***# – Execute from Emergency dial screen to unlock PUK code Bluetooth *#*#232331#*#* – Bluetooth test *#*#232337#*# – Shows Bluetooth device address GPS Test *#*#1472365#*#*– GPS Test *#*#1575#*#* – Another GPS test Service Mode *#*#197328640#*#* – Service Mode 1 *#2263# – Service mode 2 Restore/Reset *2767*3855# – Hard Reset (fully wipe without warning) *#*#7780#*#* – Restore Factory Settings Touch Screen *#*#2663#*#* – Touch screen version *#*#2664#*#* – Touch screen test Voice Dialling *#*#8350#*#* – Disables voice dialling logging mode *#*#8351#*#* – Enables voice dialling logging mode.. Just Try It.