Help T moble

[Kimber10]

First the phone. S5
Model SM-G900T
Firmware code TMB
I have anything else you might need just let me know.

Sorry I have had 3 s5 In a month. First 1 Mic was broken, second one was worse. This is the third.

So I'm wondering if the T mobile phones have unique problems? The phone seems to have a mind of its own.

 

[Kimber10]

Also is there any reason mobile data would turn it's self off? Mine does it frequently.