I've been having some problems with other aspects of my service (BingeOn & massive data usage) for several months now. Concerned that one reason for the issues was the age of my S4, I purchased a new unlocked Samsung Galaxy S5. And here's what's happening.
1. It connects to the network and I can make/receive calls and texts just fine. I can surf the web on the device itself (although sometimes it's super slow and video buffers) but when I attempt to tether or use my hotspot, which is a feature that I use daily, webpages take minutes to load (and sometimes don't load at all) and video streaming is pretty much impossible.
2. In an area where I've always had a great signal and full bars on my other device, I can't get more than 2 bars now and sometimes service drops completely for a second or two before coming back up. The 4G LTE icon shows up on my screen, but I'm far from experiencing 4G speeds. If I remove the SIM card, it shows full bars even though I know I have no service without the card...but the second I put the card back in, 2 bars if I'm lucky and back to not being able to load anything.
3. Everything works fine if I connect to wifi.
4. I've checked for band compatibility. I've checked the generic TMobile settings in the device. I've gotten a new updated SIM card. All of these possible issues have been checked off. And the problem persists. Sometimes, when I'm in the car or at a location away from home, I have full bars. But...I always had full bars at home on my other device and I live in a spot where I can actually see a cell tower from my kitchen window so I don't understand why my signal is like it is.
Is there some setting or something that I'm missing here?