I am thinking of trading my regular 6 for a 6 plus with someone on Craigslist. Obviously I know what to look out for and what to check so please no comments about that. My question is that mine is Verizon and his is T-Mobile. Will his T-Mobile phone work with my Verizon sim? If so will it be the same as a Verizon phone? Same LTE speeds and VOLTE? Thanks