I purchased a new T-Mobile iPhone 5S and switched from AT&T. Overall the signal strength and service has worked okay except in my office building. Outside I can keep an LTE or 4G signal. Inside the signal drops to 4G then to Edge. Location is Austin, 78727. The office building is normal cinder block construction. Before switching from AT&T, I was able to maintain a good LTE signal on AT&T's network inside the building, but so far I have been disappointed with the T-Mobile signal, because I need the phone to use in my office.
I have tried rebooting the phone, resetting network settings, toggling cellular/LTE on/off, etc. It's still unable to maintain an LTE signal indoors and constantly switches from 4G to Edge, with slow speeds on both. I'm running iOS 7.0.4 with the 15.6 carrier settings.
Any suggestions for improving indoor coverage? I don't want to switch back to AT&T. They are overpriced, but at least I could use the phone in my office, greatly needed. Both locations are listed as excellent for LTE coverage on the T-Mobile coverage map.
LTE does not even come up inside the office bldg, only 4g - shows 2 bars.....however no internet , email access...... Wifi not an option.
I have upgrade my iphone to 7.1.2 (11D257)
I must be able to use my mobile service in the office otherwise service is not acceptable.
I will have to do something about this situation????