Which Rsim to Buy?
 

Hey guys, I have an iPhone 4s Sprint CDMA running iOS 7. I'm located in the USA and I plan on using a T-mobile sim. I want an unlock that allows me to use iMessage/Call/Data perfectly. Will R-Sim Air give me the unlock I'm looking for? I've read in these forums that it doesn't work and that I should get R-sim 9 pro. I'm very confused with which I should get. Does anyone have any recommendations on what I should purchase or had success with either of these sims?

RSIM 9 Pro is the one for you

Dont buy any rsim, no rsim works perfect, just can make calls, wait fod jailbreak.