Signal issue

[Seabiscuit_09]

Hi,

I currently own a Galaxy S6 Edge Plus phone that I bought full price from Verizon and I shoved a T-Mobile SIM card into it that I've been using for a while now. I have a good 4G LTE connection in many places except for this one room in my campus building where my phone shows that I get 2 bars of signal but it keeps fluctuating between H+ (HSPA+) and 3G, I get NO 4G or LTE connectivity in this one room at all. And to make matters worse my classmate has a Galaxy S5 also on the T-Mobile network and he's getting a good 4G connection whilst I'm sitting on H+ and/or 3G. It's also heavily killing my battery by switching to H+ and 3G over and over again.

Also, when my phone shows that I am connected to a 3G connection, I get NO DATA TRANSFER. Only once it switched to H+ is when I get data transfer. Is it a T-Mobile issue or is it my specific cell phone model? (G928V).

Please help!

 

[Rukbat]

Check the model NUMBERS of the phones. Evidently one of them is missing the TMobile 4G radio..

 

[Seabiscuit_09]

Alright so I looking into the ServiceMenu for band selection and I can see that my phone does not support T-Mobile's 1700Mhz frequency which is needed to work on T-Mobile's 3G network, but that still doesnt answer my question why my friend has 4G/LTE connectivity in the same room whereas I don't even get a 4G signal, just a H+ or 3G (and the 3G doesn't even work). Anything I can do about that? Screenshots are below for both WCDMA and GSM.