Q:"I urgently need to unlock a locked iPhone X. It is said that using iTunes is the simplest method to finish it. But I hardly know how to operate. I used to work with Android device. Any help?" - Qijia
Forgetting iPhone screen passcode, thereby being locked out of iPhone is nothing strange. If you are thrown into this trouble, it is recommended that you connect the iPhone to iTunes to restore it. This is the easiest way to unlock an iPhone without knowing passcode. As for how to unlock iPhone with iTunes, this post gives a detailed guide.