Step 4: Click “Restore iPhone ” as soon as synchronization is complete. If this doesn’t happen, click on the “Device” tab and then click “Sync” at the bottom. Step 3: iTunes / Finder will automatically begin syncing with the device and will also make a backup of the data on the device. Step 2: If you are prompted for the passcode, try using another computer that you’ve synced the device with in the past or use recovery mode. Step 1: Connect the iPhone to the computer you used to sync the device before and open iTunes / Finder. Follow these simple steps to use iTunes / Finder to reset the locked iPhone 6:
This method will only work if you had previously synced the device with iTunes and Find my iPhone is disabled on the device. Use iTunes or Finder to Reset a Locked iPhone 6