mobile

Hello, I purchased this phone.
http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1
I have it activated on my MetroPCS line and I can only get Edge(2G). I would like to have it on 3g at least.

I can make phone calls just fine, and I can get on the internet. It's just so darn slow I can't even stream youtube..


I have rooted the phone. I cannot get on the correct frequency to make it 3g..
I have searched everywhere until the point of getting confused by so many failing methods.

Please let me know if there is a way.
I'm not sure what information you need, so please let me know what you need.
I live in North America and I live in a 4GLTE coverage area.