1. AC Question's Avatar
    Back then everything felt fine. However, since upgraded to android 5.1.1 , apps has been running slow (such as tumblr ) and more time needed when turning on the device ( words like "optimizing Z launcher for you " is seen ).
    Thats not the most serious problem , only a specific older version of instagram installed using apk could be launched , other version would just closed itself. And that version of instagram would cause device to freeze and hang at spontaneous time, and forced reboot would be needed and that's very annoying.
    I have installed an app called clean master but my problems werent solved.
    04-21-2016 11:35 PM
  2. Laura Knotek's Avatar
    Welcome to Android Central.

    The first thing I would recommend is to get rid of Clean Master. Be concerned about Clean Master's data collection and privacy practices?
    Are memory cleaners necessary??
    Clean Master. Looking for real answers
    04-21-2016 11:57 PM

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