Generic Android secret codes
These codes are mostly universal, and should work on Android devices, no matter the manufacturer. There might still be carrier restrictions on certain codes though, so they're not all guaranteed to work.
*#06# - IMEI (International Mobile Station Equipment Identity) number - essential in case your device is stolen and you want to block the thief from accessing your network
*#*#7594#*#* - Make Power button turn off your device without displaying menu
*#*#4636#*#* - Display information about phone, battery, usage and WiFi
*#*#7780#*#* - Factory reset (deletes app data and apps, not firmware)
*2767*3855# - Complete phone wipe, including firmware (not to be used lightly!)
*#*#273283*255*663282*#*#* - Back up all your photos and videos
*#*#1472365#*#* - Test your GPS
*#*#1234#*#* - Display phone firmware and PDA info
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Hidden secrat codes
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*#*#232338#*#* - Show WiFi Mac address
*#*#8255#*#* - Access GTalk Service Monitor
*#*#36245#*#* - Access Email debug info Email
*#*#225#*#* - Events calendar
*#*#426#*#* - Debug info for Google Play Service
*#*#759#*#* - Access Google Partner Setup
Samsung secret codes
Many of the above codes will also work on Samsung devices, but the below codes were tested specifically on Samsung devices, and we can confirm that they should work on them.
*#*#34971539#*#* - Show all camera information
*#*#197328640#*#* - Enable test mode for services
*#*#232339#*#* - Wireless LAN test
*#*#1575#*#* - Test your GPS (alternative to generic Android GPS test)
*#*#0*#*#* - Test your LCD display
*#*#4986*2650468#*#* - Display crucial phone information (PDA, Hardware, firmware etc.)
##778 (followed by the Call button) - EPST menu
HTC secret codes
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Samsung Android phones |
*#*#3424#*#* - HTC function test Program
*#*# - HTC Info menu
*#*#8255#*#* - Launch GTalk Service Monitor
##3424# - Diagnostic mode
##3282# - EPST menu
##8626337# - VOCODER
##33284# - Field trial menu
##786# - Reverse Logistics Support
##7738# - Protocol Revision
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Android HTC
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