As the over-the-air update KRT16S has been rolling out to Nexus 4 owners bringing Android 4.4 KitKat to their devices, some users have discovered some problems with their smartphones after the update. Reports indicate some users are having trouble with core functions like the dialer not working, different Quick Settings toggles not working and even the Home button being rendered inoperable. For the small number of users impacted by these problems, a couple different solutions have been identified that may give them some relief.
Advanced users who have adb setup on their computer can try connecting their device and running adb shell am start -n com.google.android.setupwizard/.SetupWizardTestActivity from the command line. For users without adb, it appears you can use a launcher like Nova or Apex that is capable of running custom activities to trigger the same action. Just go to the widget drawer, create an activity pointing to Setup Wizard > SetupWizardTestActivity, then run that.
If neither of those alternatives works, users can try a factory reset. Resorting to a factory reset does mean all installed apps and locally stored data will be wiped, so be sure to make a backup first.
Thus far the problems appear to be limited to upgrades that occur from the JWR66Y version of Jelly Bean via OTA or factory images without wiping data first. Users who happened to install the KRT16O update first don’t seem to be impacted. There does not seem to be any correlation between devices that are rooted or that have unlocked bootloaders and the existence of these problems.
The issues do not seem to be widespread. If you have noted any problems since the update, please share with us and if you try one of the fixes, let us know whether it was successful.
source: Android Police
Come comment on this article: Nexus 4 KitKat KRT16S causing problems for some users, possible fixes exist
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