How to Put iPhone in DFU mode in the Simplest and Quickest Way
iPhone X, DFU mode and checkm8 | ElcomSoft blog
How to Enable / Disable DFU and Recovery Mode on iPhone X, iPhone 8 & iPhone 8 Plus
IF YOU ARE SUFFERING the Iphone X onwards stuck in RECOVERY MODE. Restore with/without DFU gives Error 9, 4005, 4013, or 4014. This maybe a solution for you : r/iphone
DFU Mode On iPhone X / 8: Here's How To Enter It | Redmond Pie