How to downgrade soft ? before update a battery operated about 3-4 days at full load ( camera , BT , WIFI , @ , conversations and messages ) At present, the rate of decline percentage for the battery is more or less an 1 % per minute due to a fucking shit 6.0 android ...
Enybody can help ?

Hello , or can you give me advice on how to do it in your device back to the previous version ? At night, the phone actualization itself to fatal version of the android 6.0 update before .... Battery operated about 3-4 days at full load ( camera , BT , WIFI , @ , conversations and messages ) At pres...