Over 70 Android Secret Codes You Probably Never Knew

NOTE:... pls be informed dat some of d codes may nt work on ur device.
It all depends on d brands.

  Here are the codes enjoy!!!

Hidden Secret Android Codes
*#*#778O#*#* = Factory Data Reset
*#*#I472365#*#* = Quick GPS Test
*#*#0673#*#* OR *#*#0289#*#* = Audio Test
*#*#2664#*#* = Touch Screen Test
#’#273283*255*663282*#*#* = Backup Media Files
*#*#0283#*#* = Packet Loopback Test
*2767*3855# = Reinstalls The Phones Firmware & Format Your Phone
*#*#232339#*#* OR *#*#526#*#* = wireless Lan Test
*#*# 1575#*#* = Different GPS Test
*#*#4636#*#*‘ = Complete Information About your Phone

THE NEW GMAIL (5.0) APP FOR ANDROID OS support Yahoo!

Just updated my Gmail app to the latest version (5.0).
My observations
1) now supports personal account (yahoo, outlook)
2) faster than the previous versions
3) superb looks

Guys you all need to update your Gmail app!