IPhone 5 on Sprint? Sprint 3g vs 4g lte?

I just bought an iPhone (with update ios6.0.1) and my iPhone says Sprint 3g in the corner… But I thought it was supposed to be 4g lte or something?

You are only receiving 3G transmission from Sprint. The phone can & will operate on 4G.
The signal you are receiving is not that of a 4G capacity. It could be where you live. Call Sprint & have them check your area for any problems with the towers. This will effect the operating speed of your phone.

You probably don't have 4G LTE in your area.

Iphone 5 with Sprint 3G is best.