I have recently switched to Verizon and got iPhone 6 for my wife and me. What i noticed is that it takes very long time to switch back to LTE in places where 3G has stronger signal. I wonder if that's a network configuration issue or Apple's bug. Here are the 2 examples i observed recently:
1. When i leave work everyday i get 3G in the lift and it takes very long time to get back to LTE. Unless i force network search by toggling airplane mode.
2. When traveling if i am using TuneIn, Pandora or Maps, the signal drops to 3G it takes about 20-30 minutes to get back to LTE, although my wife's phone gets LTE much quicker.
I understand that usually network is chosen by the networks strength but 3G on Verizon is very very slow so it should be preferred option to always use LTE regardless of the signal strength. Since iPhone doesn't allow user to choose the preference i guess it is network configuration. And it would be interesting to hear if anyone else noticed it and if Verizon knows the issue and working on the fix.
Thanks.