Make sure always bluetooth and camera shutter turned off.
set brightness(senser ) to minimum,
Try to charge battery after full empty of battery,
Only charge 2 and half hours maximum,
Buy a genuine battery(original).
Make sure all application closed (Minimisation of applications cause charge removal),(Press and hold menu key show if threre is any applications works on background),
Try to format phone by press *#7370# Install a good antivirus(netquin)
Hi, there is your mobile dialing fault there may be inner keypad is demages. so if you can chang it, pl chang and check it. For ur second problem is phone not go on when fully discharges, at this time you have to put your mobile under charging for three or four hour, dont worry when u put mobile in charging mobile will not shows charging but there is a charging is on in mobile after one hour mobile will shows charging automatically. ok. test this and pl.reply earliest.
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