What a confusion! Can't just sell it unlocked, and charge you ETF if you abandon their plan? All this locking BS is just upsetting.
T-Mobile has always unlocked my phones for international use, free of any charge. Then I'll choose the carrier I want to use when I travel.
It seems that Sprint wants to charge an extra fee to allow international use of the iPhone??? WTH!?
I guess it makes more sense to buy an unlock phone and chose whatever carrier you want.
Except you cannot use AT&T or Verizon with the unlocked phone in the US, which is why this whole thing is stupid.