It hasn’t been long since the official Android 4.4 KitKat update rolled out for the Google Nexus 4 smartphone. First the factory images were posted online for enthusiasts who like to manually flash their updates, and a short while after that the Android 4.4 KitKat update was rolled out over-the-air for Nexus 4 devices. Some users are reporting that the update has caused several issues such as rendering the Home button useless, breaking the dialer, non-working Quick Settings toggle and some other issues. The issues don’t appear to be widespread, as quite a lot of users running the same build report that everything is working like it should.
It seems that these issues affect those users the most who have upgraded from the final Jelly Bean build JWR66Y to Android 4.4 KitKat KRT16S over-the-air or through the factory image without first wiping the device. Users who updated through the KRT160 factory build don’t appear to be affected at all. The fix that most users have discovered to work for them is a complete wipe of the device, this obviously means that all data stored on it will be erased, so if you’re facing this issue, its best that you first create a backup of your data. The exact reason why these issues are being faced is not known at this point in time.