Brand new Galaxy 5 phone lost on Leaving Cert results night August 13/14, 2014

This Galaxy 5 phone purchased just a week ago for my son's birthday was lost/mislaid on the night of August 13,14, 2014. He thinks it may have been left in a taxi which took him from Grafton Street to Templeogue along with seven other young lads at approximately 4 am in the morning. I would so appreciate if you found the phone if you could return it as my son is totally distraught about its loss.