Most Helpful Guy
Maybe, he just has one number for you and, for the one's he's working with.
So, he might want to avoid his work people.
He could have a separate number for the personal one's and, one for the work people.
Most Helpful Girl
He could of lost or broken his phone? If it just went to voicemail when you called then maybe he purposely turned off his phone but because you called on another persons phone also I think it’s likely that he lost it.