Unable to unlock Apple Account on second hand iPhone to pair it with Apple Watch

rizirfr wrote:

I bought iPhone 11 (100% unlocked) from Facebook market place on 25 May 2025 (this is pretty much common practice which everybody does, so I did, I believe this is not a crime!)

Buying a iPhone from an online marketplace s not a crime, but it is often an expensive mistake, as outlined in

The All Too Common SAD Reality of Buying a Used iPad/iPhone – Apple Community

Even when online marketplace sellers are offering new phones for sale, those sellers frequently are not Apple Authorized Resellers. Which would mean, at the very least, that those new phones have no Apple warranty.

During setting up iPhone ID has been lock!! due to multiple try of password input

What type of lock are we talking about? If this is just a case of forgetting the passcode, you can reset the phone. (You will need to know the Apple ID and Apple ID password you used to set up the phone.)

If you see an iPhone, iPad, or Apple Vision Pro unavailable message or Security Lockout screen - Apple Support

If this phone is locked to a previous owner, and you don't know the Apple ID and Apple ID password it wants, that would be quite a different matter.

I did not receive any response from them yet however I have submitted Apple watch is original invoice from AT&T + iPhone invoice which I bought from Facebook online market.

Apple will not remove Activation Lock unless you are the original purchaser of the iPhone, and have a receipt from Apple or an Apple Authorized Reseller showing your name and the phone's serial number.

A receipt for a second-hand purchase from some seller on Facebook Marketplace is not going to be acceptable. If Apple offered to remove the anti-theft mechanism Activation Lock for anyone who could hand in a "receipt" from a Facebook seller, they would be flooded with demands from thieves and fences to unlock stolen iPhones.

Dear Apple, my case is pretty straight forward and simple!

You're not speaking to Apple here, but it sounds like your case is pretty straightforward. If you are saying that the phone is Activation Locked to a previous owner, then you are telling us that you bought a used iPhone that at best was not properly prepared for resale by the previous owner, and at worst is stolen property. If you did buy a lost or stolen phone, you might not have realized that you were doing so, but it doesn't mean that Apple is suddenly going to disregard the interests of the true owner.

What did the Facebook Marketplace seller say when you contacted them? Or did they "disappear" or block you – as so many sellers of Activation-Locked iPhones do?