You'll need a computer (Windows or Mac) with the most recent operating system and iTunes software installed in this situation. Once you've gathered all of your materials, proceed as follows:

1. Use the USB or Lightning cable that came with your iPhone X to connect it to your computer.
2. Wait for iTunes to identify your iPhone when you open it on your computer.
3. In iTunes, choose your iPhone X from the list of devices.
4. If required, select the option to backup your iPhone X to iCloud or iTunes on this computer.
5. Then, to reset your device, click the Restore option.
6. If prompted, confirm the operation by clicking Restore once again.
7. Wait until iTunes is finished downloading and installing the new software for your iPhone X then set up your device as new.
8. Read more