Hello friends, i live in india and want to buy an iphone 5 from from US, but i have following questions ... 1.Will the unlocked iphone will activate from any sim card (Indian carrier nano sim ) even after upgrading to new ios ? 2.Do we have to submit any verification document while purchasing an off contract iphone from apple store ? 3.Which iphone should i buy ATT&T or Verizon off contact to use it in india ? 4.The off contract iphone cost $650 ,is it inclusive of taxes or have to pay taxes exclusively ? If yes then how much tax is applicable ?