Could i use h20 service on iphone 5?

I wanna get iphone 5 but i don't know if i can use a h2o sim card in it. And also would it matter where the phone came from? For example verizon or sprint or at&t?

The phone would have to be unlocked & yes it would matter. Verizon & Sprint are CDMA carriers, which don't use SIM cards.AT&T is GSM which does.

The Verizion iPhone 5 is unlock but if H20 has LTE comaptible with the iPhone the Verzion iPhone would only Get 4G no LTE. The At&t version Would.h20 is gsm so get the At&t version.