My understanding is that the phone, without the 1700 mhz. Band will not get full performance on 4G LTE.
Internet speeds may be slower, and there is a possibility that you might not be able to be on a call and the Internet simultaneously.
There is a Samsung Galaxy 4 mini
GT 9195 [ catchy name lol] which HAS 4G LTE but is missing that 1700mhz. Band which Metro PCS and TMobile phones have.
We need a Tech from TMobile to verify.
I am looking for a hi performance pocket phone and TMobile does not carry Minis and the S5 Mini and the
HTC One 8 Mini [ another catchy name] will be out soon...
Hoping TMobile will step up on these .