If you're running iOS 7 or higher on your iPhone or iPad, Find My iPhone now comes with a feature called Activation Lock that prevents someone from wiping and using your device without your authorization. While it's a great theft deterrent, we see lots of people having issues due to forgetting to turn off Find My iPhone. Most commonly the problem comes up with second hand iPhones that have been bought, sold, or traded. Luckily, the previous owner can deactivate Find My iPhone remotely which should then, in turn, allow you to bypass Activation Lock. Here's how:
Before beginning, please note that the original owner of the device will need to know the iCloud email address and password that is currently tied to the device. Without that, there is no way to bypass Activation Lock or Find My iPhone. The original owner will need to perform one of the following options, unless you know their iCloud info and can do it yourself.
Also, not all methods work for all people. You may have to try all three before you find one that works for you. So if the first method you try doesn't work, make sure you try the other one.
That's all there is to it. If for some reason you don't see a Remove option, which some people won't, you'll need to try the method below using iCloud.com instead.
If you got a popup with device information on the map instead of the device information screen like shown in the steps above, verify the device is Off and Find My iPhone isn't finding a location for it. If that's the case, follow these steps:
That's it. No matter what method you followed above, the iPhone, iPad, or iPod touch in question should now be removed from the iCloud account it was associated with. Try restoring it again and this time, Activation Lock shouldn't be an issue.