How to Unlock iPhone without Passcode
1.Connect your iPhone to your PC or Mac.
2.Select your device in the iTunes sidebar, and click the”Summary” tab.
3.Click “Check for Update”. iTunes will show you if there is any new version of iPhone software available.
4.Click “Restore iPhone“. You can finish the restore process by following the instructions given. During the process, a recommend that tells you to back up your files will be given. You can restore your data after the process is complete.
Now, you must have restored your iPhone.
Note: Even you bring your iPhone to the Apple service center, Apple staff also need to restore your iPhone to unlock it. That’s to say, you need to erase everything on it.