New owner got locked out of phone

Forgot his Lock Screen passcode?

If you forgot a passcode that he changed within the last 72 hours, see the following for instructions: Temporarily use your old passcode when you forget your new passcode on iPhone or iPad - Apple Support

Otherwise, there is an Apple article that explains what to do if he has forgotten an iPhone or iPad passcode. Click on the following link: If you see an iPhone or iPad unavailable message or Security Lockout screen - Apple Support

If that is not an option, he will need to use a computer. See: If you forgot your iPhone passcode - Apple Support

or forgot his Apple ID/iCloud password?

There is an Apple article that explains what to do if you have forgotten your Apple password. Click on the following link: If you forgot your Apple ID password - Apple Support

Alex_2024- wrote:

i sold my iPhone , the new owner forgot his password and got the phone totally locked ! Is there a way for us to get this phone unlocked ? Maybe at the Apple Store ?

they can do this :

If you forgot your iPhone passcode - Apple Support

Alex_2024- wrote:

Yes he is trying , but after the accident the new owner can’t remember anything

He will first need to find his Apple ID email:

If you forgot your Apple ID - Apple Support

Then will need to reset the password:

If you forgot your Apple ID password - Apple Support

Apple will not be able to help.

Alex_2024- wrote:

Thank you , he got the password of the associated ID but not the EMAIL ! So the answer will be … prove of purchase to Apple . Inside an Apple Store I guess ?

Per Apple: "If you need help removing Activation Lock and have proof of purchase documentation, you can start an Activation Lock support request."

You will want to present your original proof of purchase from Apple or an authorized reseller.

With that, Apple will usually unlock.

Alex_2024- wrote:

Yes he is trying , but after the accident the new owner can’t remember anything

Making some inferences and some assumptions… I’ll also assume you know the buyer too, as this can be part of a scam.

If you still have the original proof of purchase, refund the purchase and retrieve the iPhone, then contact Apple Support for the unlock, and find a buyer that needs less support.

Consider that if this (known to you?) buyer is already in trouble here, whether using the usual iPhone user interface or the available Assistive Access user interface will be all that much help?

All the different unlocks: How to Unlock an iPad or iPhone? - Apple Community

Alex_2024- wrote:

The phone is 100% locked , he doesn’t know the email to sign into his Apple ID anymore ! I am willing to help in any way possible

If you forgot your Apple ID - Apple Support

Alex_2024- wrote:

Yes he is trying , but after the accident the new owner can’t remember anything

we have all provided links for the issue your friend is having click and follow steps provided in the link.