Haier PAD 821 - secret codes.
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*#06# - IMEI (International Mobile Equipment Identity) number
ANDROID secret codes for Haier PAD 821
*#06# - IMEI (International Mobile Equipment Identity) number
*#*#4636#*#* - This code can be used to get some interesting information about Haier PAD 821 and battery. (Phone information, Battery information, Battery history, Usage statistics)
*#*#225#*#* - Shows you everything that is saved on your Calendar such as Events, Holidays, Trips, Birthdays, Anniversary
*#*#426#*#* - This code show Google Play
*#*#759#*#* - Access to Rlz Debug Ul
*#*#36245#*#* - Debug email in apps/Email
*#*#8255#*#* - To launch Google Talk service monitor
*#*#64663#*#* - Open engineering mode (Version, Bluetooth, Battery, Speakers)
*#2886# - Factory Auto Testing
*#*#273282*255*663282*#*#* OR *#*#273283*255*663282*#*#* - Opens a File copy screen where you can backup your media files
*#*#7780#*#* - Reset to factory settings. It'll remove following things: (Downloaded applications, Google account, all data and settings)
*2767*3855# - This code is used for factory format.
*#*#7594#*#* - Change the "End Call / Power" button action in your phone.
*#*#34971539#*#* - Haier PAD 821 Camera Information.
*#*#97#*#* - Language and Keyboard settings in Haier PAD 821
*#872564# - USB logging control
*#301279# - HSDPA/HSUPA Control Menu
*#9900# - System dump mode Haier PAD 821
*#*#46*#*# - Reset Sim in Haier PAD 821
*#*#197328640#*#* - Enter service mode to run various tests and change settings
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#*#* - For a more advanced GPS test
*#*#232331#*#* - Bluetooth test
*#*#232337#*# - Shows Bluetooth device address in Haier PAD 821
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