http://receivefreesms.com/
http://receivesmsverification.com/
http://freesmsverification.com/

http://pinger.com/tfw/ APP可接电话和短信，可验证通过大谷歌环聊。

https://www.google.com/voice 环聊需美国号码 电话验证，就是上面的pinger验证可过。