First let me start out by saying I purchased a silver 5s on launch and did not have issues with that phone. However, I recently returned it for a gold 5s and it seems as if something isn't right. The issue at hand is that it takes a while to go from 3g to LTE service. For example, I have LTE service in my apartment complex at all times. Lets say I come back home after work, I take the elevator to reach my floor (phone automatically goes to 3G which is expected) but when I enter my apartment, it continues to read 3G until for about 1 minute. Why is that? My samsungs and iphone 5, silver 5s were all quick to go from 3g to LTE. Also I have noticed that if I go to settings and disable LTE/then enable it, it automatically detects LTE (sort of like a manual push) Is this normal? I have called sprint and they tell me it "must be the antenna on the iphone 5s" Any ideas?