1. AC Question's Avatar
    I just updated my Nexus 4 to Android 5.1 a couple days ago. At first I was having an issue because my phone wouldn't turn on, and when it did it says in a red box "DOWNLOAD MODE". It was like that for a few hours and then started up and didn't recognise my SIM card. After several hours of it going between those 2 things it finally started working.
    I was also having done issues with the " No interruptions for X amount of time not working.
    Last thing is the brightness slider and sorry brightness mode aren't working. My phone is stuck having a very dark screen.
    Any suggestions?
    04-26-2015 03:10 PM
  2. B. Diddy's Avatar
    Welcome to Android Central! Was it an OTA update, or did you manually install? It might be worth reflashing the factory image: How to manually update your Nexus | Android Central. Find the proper firmware here: https://developers.google.com/android/nexus/images
    04-26-2015 10:25 PM

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