Got my phone exchanged at the Apple Store still having LTE issues where I live. I think it might be the carrier towers in my area.
Sent from my 6th gen iPod touch using Tapatalk
Sent from my 6th gen iPod touch using Tapatalk
I've been having a similar issue with my 6s, 50% of the time when I look at my phone it's on 3G and will take ages to get a LTE signal. I went to a Verizon store and actually replaced the SIM card but the problem still happens. Never had this problem with any of my previous iPhones and my wife's new iPhone 6s+ is working fine in the same area.
Let us know what the carrier finds out.