Iphone unavailable
My son's abroad on holiday with his Dad, his iphone (7) suddenly started displaying the iphone unavailable screen despite the correct pass code being used. I am in the UK and have arranged a factory reset but this can't happen until he connects to a wifi the phone knows. I am just wondering if there is anything more I can do to try and help. Thanks to anyone who might be able to offer some advice :)
iPhone 7, iOS 15