Contribution d'origine par : Linus ,
You could always try to wipe the device remotely with “Find my iPhone“ and another Apple device that is logged in with the same Apple ID as your phone. If that doesn’t work, hook it up to iTunes on a computer. Enter recovery mode by holding in the power button and the volume down button. Keep them that way until your phone has entered recovery mode. You can now release the buttons and iTunes should detect the phone. iTunes will give you 2 options: update or restore. Choose update, and iOS will be reinstalled without getting your data wiped. Your phone will hopefully work after this. But I recommend you to read [https://support.apple.com/en-us/HT201412|Apple’s Help Support] about problems like this to get the best answer. Have a good day.