I had T-Mo for about 18 or 20 months. Signal penetration in my apartment was horrible. Switching to ATT flavored ST cleared that up. I don't hear many complaints about ATT penetration...
You could try swapping over to a T-Mo flavor SIM with ST. It would be odd if it helped due to the notoriety of T-Mo not penetrating buildings well... Try calling ST and seeing what they say.
Your building isn't metal clad by any chance? I know that borks things. I was at the vet's office a few days ago and could not get a pic from my OneDrive until I went outside and that was a metal structure.
03-15-2015 10:51 AM