The last month my iPhone 5 has often been slow as fuck when I'm not on wifi. Wonder if it's a 4G problem or an iPhone problem. Anyone else notice a slowdown?
Faith is believing what you know ain't so. -- Mark Twain
Gala-kei here, and only upgraded because they turned off 2G, so I have nothing to say about 4G, but you might get more useful responses if you specify which network you are trying to connect to. I hear that Vietnam is great on the beach but Softbank is shit.
On AU iPhone 5 without any problems like SJ mentioned. Occasionally apps get slow (FB and Tapatalk I'm looking at you), but the occasional restart usually takes care of that.