1 . Make sure all connections have been turned off : such as Wifi, Mobile data and Bluetooth are off!

2 . Make sure the brightness of your phone is ''Minimun''

3 . Make sure you have turned on the ''power saver'' in your phone.

4 . Turn your network mode to GSM

5 . Make sure the theme effect in ''off''

6 . Set The screensaver ''None''

7 . Make sure when you leave your phone there is no application is running.

8 . Make sure you have locked the screen of your phone before you leave it.

Thanks grouphug.gif