There's many posts on people using STA 3 and 5 on AT&T in the US and I understand they both work well. I'm about to pull the trigger and order on GSMNation but wanted to check once more in case I missed anything.
Is the model 5 the best one to get for all round use? I know there's no LTE. I'm in Fl in case it makes any difference.
If this was a decision I was making, I'd get the -5, simply because it's an "all-GSM" phone, and has one extra LTE band (band 2) that AT&T has fielded in a handful of markets.