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I didn't know you could turn the LTE radio on and off :0

Even though Sprint has yet to turn on their network in San Francisco, I'll patiently await the day they do turn it on so I can help break it.
 
I'm probably in the minority, but I do switch off LTE when I'm at home. Reason being that I have a Verizon 3G network extender in my home so I can make/receive calls at my house.

If I leave LTE on when I'm at home, I've noticed that the iPhone 5 does automatically fall back to my 3G network extender when I make or receive a call. That's nice. However, as soon as I hang up, the phone goes from 5 bars to one or two as it locks back onto the LTE signal.

When the phone is on standby, I'd prefer that it not drain the battery more quickly because the phone is straining to latch on to the weaker LTE signal. When I'm at home, I'm using data over Wi-Fi anyway so I have no use for LTE here at the house.
 
Turning on/off LTE comes down to the individual. Some people will have better LTE coverage than 3G/HSPA+ coverage so they should leave LTE on. Others will have better 3G/HSPA+ coverage so LTE off is a better option. What complicates the issue is that all the carriers are rapidly expanding LTE so your situation may change without you evening knowing it. In theory, when LTE coverage is mature, it will be better to leave LTE on due to it being in a premium spectrum vs. 3G.

BTW, heavy data usage will make the iphone back hotter...i think the casing is used as a heat sink to dissipate heat.
 
I keep mine on. My data usage has not gone up since getting the iPhone 5, and I'm well within my plan. Battery life has been excellent, too so I see no reason to be constantly fiddling with it.
 
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