The iPhone 5 features LTE which delivers blazing fast download
speeds, but it can also cut battery life and in some situations leave
users with a phone that can’t connect. While traveling in New York, we
turned off LTE and went form no signal to full coverage in 3G.
This is slower, but it turned the iPhone 5 from an unusable LTE
smartphone to one with a slower, reliable 3G signal. To do this, go to Settings -> General -> Cellular -> Enable LTE to Off. More on how to turn off LTE on the iPhone 5.
Turn off 4G LTE to save battery life and get better coverage.
