Quick tip if you use straight talk all you need to order i straight talk att sim card. That gives you full 4g... If you use the straight talk t mobile sim you'll only get hspa +. If you have the t mobile sim then you'll need to unlock the phone and then set the phone up for T-Mobile network.
Add there is no need to unlock the phone.
Sent from my LG-E980 using XDA Premium 4 mobile app
Phone list: HTC Touch Diamond, HTC Touch Pro 2, Samsung Moment, Samsung Epic, HTC EVO, HTC EVO 3d, Samsung Epic touch, Samsung Galaxy s iii ---- Don't know what is next.