How to Erase All Data on iPhone X

Thanks for attention. Here are 4 simple ways to erase all data on the iPhone before donating it.
1. Go to Settings - General - Reset - Erase All Content and Settings;
2. Connect the iPhone to iTunes to restore it to factory settings. Suppose it fails, try putting the iPhone into recovery mode and then use iTunes to restore it;
3. If Find My iPhone is enabled on the iPhone, then use iCloud to remotely erase the iPhone;
4. Alternatively, try Joyoshare iPasscode Unlocker. It has the ability to completely erase all data on any iOS device at ease. www.joyoshare.com/
I hope these are of great use to you all.

To erase all data on your iPhone X, there are two ways to achieve that.
1. Go to Settings > General > Reset > Reset all settings.
2. Using iTunes to restore your iPhone and don't backup data. In this way, your iPhone X data will be removed.
In the end, if you want to get back these data one day, even if you don't have a backup, you can use any professional iOS data recovery  tool to recover them.

Using the iTunes, you can erase all data on iPhone X, or you can reset iPhone to factory, or you can use a iPhone data eraser tool to deleted all iPhone photos, videos, contacts, messages and other info.

Here is a solution may be can help.
How to Eraser All Contents and Settings on iPhone