worldsim 的美国号码不能注册账号，只能用来接打电话，英国号也是不支持（有时有效，有时无效），下面是跟客服的对话
我：the International SIM Card USA moblie number can register an googlevoice?
客服：Hi, this is Cathy to assist you.
客服：no i am sorry
我：Twitter?
我：Can't twitter do the same
客服：i am sorry US number can be used only for calling
我：The UK is ok?
客服：yes however, we do not allow our sim card to be used for any third party application
I don't understand.
客服：our sim card may not get any verification code from Twitter
客服：sometime it works sometimes it doesnot