你如果不买data plan, AT&T应该是不收费的。

来源: 于 2012-08-14 15:04:29 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

But you never know. Call customer service for definitive answers. AT&T will mostly likely lock your iPhone regardless of its origin.

See: http://forums.att.com/t5/Apple-Community-Discussion/Locked-Iphone-4/td-p/2654029