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*#0228# It shows battery status and it is used for recalibrating your phone's battery The phone shut down at around 20% of battery level. And You Are thinking of buying a new battery?? Do You Know the battery can recalibrate to restore the correct reading. That would be the first thing You should do before you Buy new battery. Note Before you proceed, make sure that your battery life level is less than 30%. This is because of multiple reports from forumers that it works better at this level. Step 1 Open phone dialer and dial this number : *#0228# You will see battery status screen and it will show information about your battery Step 2 You will see there is a "QUICK START" button at the bottom of the screen. Press the button to start the battery calibration. This simple code can increase your Android phone battery life upto 16%

Here Are top 10 Very Useful Android Secrets Codes for all Samsung Galaxy Phones. There are interesting Android Codes That Unlock very useful secret Features on Your Phone. 1-*#7353#         It used to test many things like Camera, Sound, and Vibration etc 2-*#1234#         It shows PDA and firmware info 3*#0228#         It shows battery status 4-*#06#         It shows IMEI of the device 5-*#0*#         It allows testing LCD and other hardware 6-*#12580*369# It shows both software and hardware versions 7-*#9900#         It allows to enter in System Dump Mode 8-*#0808#         It shows USB settings 9-*#0011#         It shows information about GSM Network 10-#7465625*638*# It is used to insert Network Lock control Key Code