Tushar12333, May 19, 2017 : 1 : Go to settings - scroll down - click about phone - scroll down again - click build number 4 or 5 times until it says "You are now a developer" Step 2 : Go back - In settings you can see a new option named as Developer Options - click and enable it. There are many things there...dont worry! Enable Doze Mode and Advanced reboot only. Dont do anything else! Step 3 : Go to settings again - battery - look into the top right corner, you can see 3 dots - click it and select agressive doze and app hibernation. It is enabled there. Disable it. (Its important that you disable this) Step 4 : Go to settings - Storage and Memory - Storage - Click Cached Data - Press ok. Step 5 : Go to settings - Apps - select Google Play Services among the list - click storage - manage space - clear data. After that dont press back or home key. Step 6 : Go to settings - back up and reset - back up my data (turn it off). Step 7 : Press and hold the power button - select reboot - You can see three options now! that is - Reboot , Recovery , Bootloader. Press Recovery and your phone will automatically boot in recovery mode. ( No need to do tiresome press , hold and all ). Step 8 : When in recovery mode - Select English - Wipe Data & Cache - click Wipe Cache option - Press ok - Then you get two options - Reboot , Done - Jst press Reboot and your phone will boot up normally. Trust me you will see the results.