ESM- x EMM - 8 topic

Hello so i live in new york. My friend who is also on sprint with a s3 has said he has had 4g the past 6 months. Iv NEVER seen 4g on my phone ever. We were in the same room and he got 4g lte and i got 3g. I was wondering why i dont get it?!?!

I see sometimes i get an error that says "ESM - x "EMM - 8"