iPhone 6 with iOS 9.3.1 stuck restoring
Three things come to mind one have you tried resetting doing a hard reset by holding home button and the power off button till the apple logo comes up and says to connect to iTunes then connect to iTunes and restore another couple of lil tricks are hold the power button till it brings up slide to power of instead of powering off ur phone hold down the home button this will wipe all back loading apps another thing is go to App Store and after the App Store loads up hit the explor button 10 times if none of this works got me but my mothers phone did the same thing and by doing these things a few times it is now working not sure tho