I have an iPhone 5S Factory Carrier Unlocked . I am running IOS 8.3 on it. My Problem is that my cellular network provides LTE service and full coverage in my area. But I'll get 4G instead of LTE. I have tried to put sim on different brands phone to check the coverage and I got LTE signals on them. But on Apple products I only get 4G. I also have IPAD Air 2 with sim. I also checked on it same result 4G instead of LTE. I also noticed there is only three option in Voice & Data (2G,3G,4G) I think this might be a problem I have no option to enable LTE in both iPhone and IPAD. Let me remind I have checked my carrier on different brands phones which supports LTE and my Cellular Network is working fine on them with LTE coverage. So obviously there is no problem with my carrier. My iPhone model is A1457 and my carrier is on LTE frequencies,1800 MHz (FDD-LTE band 3) which completely supported by this phone model Can any one sort out the problem. Thank You !