.GOOGLE LAUNCHES ANDROID O DEVELOPER'S PREVIEW ON 21/3/2017 AS IT COMES AFTER THE ANDROID NAUGAT I.E. ANDROID 7.0 IT SEEMS THAT IT WOULD HAVE A GREAT CONTROL OVER THE OVERCOMING NOTIFICATIONS THAT SOMETIMES BECOME IRRITATING FOR A ANDROID USER. SO ITS A BIG IMPROVE IN STABILITY IN ANDROID 'O' AND IT GRANTS ACCESS TO BACKGROUND APPS CONTROL WHOSE PROCESSES MIGHT BE STOPPED WHICH IMPROVES CHARGING SPEEDAND LONG LASTING TIME PERIOD AFTER CHARGING SO YOU HAVE NO NEED TO NEED TO ROOT YOUR PHONE TO GET YOUR PHONE'S ROOT ACCESS FOR UNISTALLING USELESS APPS WHICH DRAIN YOUR PHONE'S BATTERY LIFE . SO ITS A GREAT IMPROVEMENT BY GOOGLE FOR ITS ANDROID PLATFORM BY WHICH BEFORE MANY PEOPLE SUFFERED BUT NOW IT'S NOT LIKE SO. SO,VERY SOON IT WILL BE LAUNCHED GIVING YOU GREAT RELIEF FROM THIS PROBLEM.