Can iphone 4 support tmobile 4g?

Can it support the hpsa+ not LTE, if not will tmobile make it compatible or will 3G be the most we get

No it doesn't have the proper chip. And only can have 3G sorry buddy

It can support HSPA+ speeds yes, but it will read as 3G as the iPhone recognizes LTE as 4G. Only in a special case on AT&T did Apple bend that a little to show 4G while using HSPA+.

At the same time though, T-Mobile is rolling out an iPhone compatible high speed network so you may be restricted to EDGE at this time.

Yes, if you are on AT&T. On my iPad 1, I had cellular connections, and that time it was only on AT&T. Since most people use AT&T, tenet work speeds can sometimes be slow.So, I bought a T Mobile SIM card. Since you are you using the iPhone 4, it can't go past 3G, so you would have to buy a T Mobile 3G SIM Card, and pop itin. If you lost your SIM revolver tool, I would suggest using a thumbtack. Just stick it in, press hard and it should pop right open. Oh, and make sure you get a Micro SIM. Hope I helped!