So I was in downtown Palo Alto, and someone I was sitting next to had an iPhone 5 as well, however, his said 'LTE' on the upper left. But mine does not. My device only displays "4G". According to AT&T's map this whole area is supposedly in LTE territory. Is there something I have to do to make sure LTE is actually on? I've done speed tests and I never get above 5Mbps-9Mbps. Anyone else experience the same?