His G+ says he lives in London so it's pretty unlikely he's using AT&T! Other than some slight differences in coverage, all of O2, Vodafone and EE (aka Orange +

His G+ says he lives in London so it's pretty unlikely he's using AT&T! Other than some slight differences in coverage, all of O2, Vodafone and EE (aka Orange + T-Mobile) should be roughly equivalent when it comes to not needing any tweaking to get your phone working properly.