Hello everyone. I have a phone repair center in Turkey. Many costumers come to my store and ask me "Can you unlock my icloud?". But I cant help them because I dont how to do that. Anyone can help me about this problem?
You can't. If a phone or device is linked to someone else's iCloud or Apple ID, the original owner needs to unlock it.
If they mean they have forgotten their own passwords, they can change the passwords by following these instructions: