Think back, what have you installed recently? What has been updated through the Play Store or other such service? Go through each entry in settings and verify you haven't inadvertently checked or unchecked something. Turn off all syncing and disable any auto photo, system back up etc uploading. Check in about phone and see if you're up to date on system software. If you are you're probably not getting an OTA.
If nothing else, you can always back up data and such off phone and do a factory reset.
Sent from my Nexus 4 using Tapatalk
Three out of four voices in my head want to sleep. The other wants to know if penguins have knees.
First you forget names, then you forget faces, then you forget to pull your zipper up, then you forget to pull your zipper down. ~Leo Rosenberg