If it is his personal phone I think he would have got a call from work, family,friends... but the phone is on and no calls whatsoever..
In a situation to lose my personal phone I would get my friend/sis to dial the number hoping someone found it, answer and get the details from where I can get it back.
Dont think guys care much about punting phones and much prefer to not be known by the Guards...even if the phone is not in his name, something we dont know for sure...