This is actually a weird arrangement, that is, limiting your users coverage, but it turns out that:
...Apple gets $3 a month for every existing AT&T subscriber who has bought an iPhone and $11 a month for every new customer. That looks like about $150 per user for Apple, on top of the margin on the phone itself. So although Apple can make money selling iPhones to anyone, the company gets considerably more if it drives those users to AT&T. Which is what it is doing...(from John Naughton of the Guardian website)I dislike the idea for a personal motive: AT&T's is not the cheapest plan. But I can not blame Apple to sign the contract with them. Apple has the right to do so.
So does the consumer to unlock the machine and use cheaper network, I must say.
But, alas, AT&T lawyer seems ready to bring you to the court, preventing that unlocking business. The law, so far, doesn't say anything yet on this matter. But if the law rules against unlocking iPhone, as Naughton wrote in that column, the law is an ass.
By the way, unlocking iPhone would not be a problem in Mangga Dua, would it? Has anyone tried it?