1. David Bent's Avatar
    Ever since I installed the new Android update, I started having trouble turning my phone on. Whenever I do so, the screen flashes about 3 times, and occasionally displays a message saying "Unfortunately, System UI has stopped working". While the screen is flashing, I can't do anything, so I have to wait for it to finish, and now I can't answer any calls because they hang up by the time my phone starts working.
    04-16-2015 07:30 AM
  2. B. Diddy's Avatar
    Welcome to Android Central! Which phone, and which update?
    04-16-2015 07:17 PM
  3. David Bent's Avatar
    Nexus 5, Android 5.1
    04-16-2015 07:35 PM
  4. B. Diddy's Avatar
    I have a feeling I answered this in the Ask A Question forum--did you ask it before registering?

    Anyway, start by wiping the cache partition, which can take up to 10 minutes on a Nexus 5, so be patient: http://forums.androidcentral.com/nex...-recovery.html
    04-16-2015 11:06 PM
  5. David Bent's Avatar
    What do I do afterwards?
    04-18-2015 06:28 AM
  6. B. Diddy's Avatar
    After the cache wipe, select Reboot System Now.
    04-18-2015 12:16 PM
  7. David Bent's Avatar
    I mean after the recovery is completed.
    04-19-2015 12:06 AM
  8. B. Diddy's Avatar
    After the cache has been wiped and you reboot the system, see if things work better. Are you still having problems booting up? Is the SystemUI still giving you error messages?
    04-19-2015 12:59 AM
  9. David Bent's Avatar
    Yes, to both questions.
    04-19-2015 12:37 PM
  10. Rukbat's Avatar
    You may have to do a factory reset. (Back everything up first - Backing up an Android Phone.)
    04-19-2015 01:29 PM
  11. B. Diddy's Avatar
    Or maybe reinstalling the factory image: How to manually update your Nexus | Android Central. Find the proper firmware here: https://developers.google.com/android/nexus/images
    04-19-2015 08:55 PM

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