AT&T go phone should work if you set the APN using unlock.co.nz via wifi.
T mobile has 3G that works on iPhone but only in some locations.
It pays to research before you travel
AT&T don't like people BYOD'ing iPhones to their network.According to AT&T that only worked for IOS 6.0 a not 6.1 or not yet anyway. They tried it on my phone.
Does anyone have any experience with getting a local SIM in US? Is it a big hassle?
Have you found good coverage with T-mo recently? The coverage map looks as though it will be good in the places we are traveling. It also looks like the easiest option for using iPhone hotspot.
Is buying T Mobile direct the same as buying it through net10.
what about A1429, which is what Apple sell in Australia?On a related note, T-Mobile are releasing a carrier update on April 5th (USA time) to allow A1428 iPhone 5's to support 1700mHz. It will not support their enhanced data speed (HSDPA+ which supports 42Mb) on 1700, but it'll allow you go access their LTE network at least.
what about A1429, which is what Apple sell in Australia?
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