My son recently lost his phone. When he tried to access his Apple ID it sends a code to his phone number the problem is he recently changed his phone number but didn’t change it in his Apple ID. He has no other apple products.
How can he recover his account
If he has no other trusted devices or numbers he will have to use account recovery:
How to use account recovery when you can’t reset your Apple ID password - Apple Support
He may also wish to read this document which has a list of things to do if your iPhone, iPad, or iPod touch is lost or stolen. --> If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support
If he has no other trusted devices or numbers he will have to use account recovery:
How to use account recovery when you can’t reset your Apple ID password - Apple Support
He may also wish to read this document which has a list of things to do if your iPhone, iPad, or iPod touch is lost or stolen. --> If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support
Two factor authentication
