unable to factory reset iPhone 7 plus
I try to format my iPhone 7 plus via with and without iTunes but unable to do so.
I try format it with iTunes, it keeps asking me to switch off "find my iPhone" and I try to turn off, there is an error message "there was an error connecting to iCloud".
Same thing happen when I try to format without iTunes.
Then I try to sign out from my iCloud, same error message is show.
I need to format it as there is no storage in my iPhone 7 plus even I deleted everything. I check with the service centre and they advise me to factory format my phone.
I can't believe that now I stuck in this situation, unable to use my phone to do anything.
please advise. please help me.
iPhone 7 Plus, iOS 11.1.2