My iPhone 6 will not connect to the 4G LTE network. I live in zip code 71111 and work in zip code 71106. Everyone else in my office that has Verizon gets a strong LTE signal on their phone. I have tried adjusting all the settings, done all the resets, and tried everything that has been recommended by tech support. My phone will not connect to LTE, it stays in 3G. This is very frustrating because it is a work phone and the the iPhone 5 that I upgraded from always got a strong 4G LTE signal. Is there anything else that can be done? If not I would like to cancel my plan and switch to another carrier.