I can't update my iPhone 4 v7.1.2 (11d257) I tried updating apps and it directed to enter password for a different Apple ID which is not mine. Please what should I do.
Go to Settings -> iTunes Store &amp; App Store, and click on the apple account (first thing on the list) 



Then click Sign out and reboot



Go back to Settings -> iTunes Store &amp; App Store and enter login + password for your account