I don't remember the iCloud id, now I can't active it
How can I active the iPhone 12 pro ? I got one from my friend but I can't active it after upgrade newest iOS , my friend can't not remember his id because its was made by seller and he did care about it during his usage. Now the phone cannot be active after upgrading new IOS firmware, with the id d*****@icloud.com . Plz guide how to active it ? Tks a lot .