http://www.slashgear.com/verizon-iphone-4s-sim-unlock-rules-cla 读读这个, 大概意思是: Verizon 可以打电话Unlock (之后可以用GSM SIM 卡么?) from Verizon Public Relations Spokesperson Brenda Raney, who notes: “It is our standard unlock policy for all Global Phones. You have to have been a customer for 60 days and in good standing (meaning your bill is current) and the phone you want to unlock must be on our network at the time of the request. You call Verizon Wireless before you leave the country and we unlock the SIM. We will honor one unlock every 10 months.” — Brenda Raney, Verizon Wireless Public Relations Sprint 绝对不会提供unlock,因为他们首次加入iPhone,风险太大 Then there’s Sprint, jumping in on the iPhone market here for the first time, perhaps taking too big a risk in doing so, having the iPhone 4S not available for international unlocking at all. 各位看看解释对不?