My iphone 6 will turn off if i let it go to standby and don't unlock it again with in a couple of minutes, and then wont turn back on unless i hold the power and home button together for about 20 seconds.
If i just leave the screen on and turn off auto lock its stays on, but this drains the battery quickly.
Anyone know what could be causing this?
iPhone 6, iOS 8.1.2
Try to reset your device. This won't delete your data stored on the phone.
Alternatively, you may go to Settings - General - Reset - Reset All Settings
If this does not help, try these steps. Note that this may erase the data from your computer.
You need to restore your device to factory settings.
Take a look this Apple Support article: Use iTunes to restore your iPhone, iPad, or iPod to factory settings - Apple Support.
As a final step, try the recovery mode. Turn your device off, then plug it to your computer with the home button pressed. You will need to have iTunes installed on this computer. Keep the Home button pressed until you see the iTunes logo on the screen of your iPhone. After that on your computer you should see the iTunes window saying your iPhone needs to be restored to factory settings. Click on the restore button.
Here you can find some useful tips on how to make the battery life of your device longer. They work for both iOS 8.2 and iOS 8.3.
Iphone 6 turns off when it goes to standby
