When an iPhone 5 on AT&T or T-Mobile loses LTE in a limited coverage area, it reverts back to the 4G network. When my iPhone 5 on Verizon loses LTE in a limited coverage area, it reverts back to 3G. Why does Verizon have 3G instead of 4G when it loses LTE on an iPhone 5.
I've also noticed that the iPhone 4S from AT&T and T-Mobile shows the 4G network icons while the Verizon and Sprint's iPhone 4S shows the 3G network icons.