The unlocked iPhone works only on supported GSM networks, such as AT&T in the U.S. When you travel internationally, you can also use a micro-SIM card from a local GSM carrier. The unlocked iPhone will not work with CDMA carriers such as Verizon Wireless or Sprint.

看到这句话，有点迟疑啊。

话有问题么，明显可以用啊

The unlocked iPhone works only on supported GSM networks
联通的3G是WCDMA

但据我了解是可以的。

will not work with CDMA carriers such as Verizon
联通是WCDMA,应该没问题吧.
AT&T 就是WCDMA

国外WCDMA就叫GSM，没错的

应该是tonyunreal所说，明白了

瑞士官网买的,能用

可以，除了不支持电信CDMA