can't turn off iPhone se after accessory not supported message appears
can't turn off iPhone se after "accessory not supported message" appears
iPhone SE, iOS 16
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Try a "forced" restart of your iPhone (if it is running iOS 16 or later, it's a SE 2nd or 3rd generation), using these instructions:--> Force restart iPhone – Apple Support
If, after restarting and performing all the steps provided in the support article that led you here the alert keeps on showing, contact Apple Support directly, as suggested at the bottom of the article itself.
Regards
Giulio