Comment by clort
Except, read the comment again - Josh changed the account so that it referenced the other persons phone number. They did not steal his phone, and it could be framed that he gave them the account.
Accusing somebody of theft? Perhaps the police would side with the non-felon..
There's no dispute that he provided his telephone number, the dispute would be over the ownership of the GitHub account, which is a separate item, and perhaps still registered in his name. Without additional details, we're both guessing.