Missed calls:
http://pthree.org/2012/01/05/my-google-voice-rant/
那你可能比较幸运,象第四个comment一样.有一天我miss了三个电话(仅算知道的从不同电话打来的),电话没响铃。
GV latency problem:
http://www.pcmag.com/article2/0,2817,2383262,00.asp
还有AT&T和GV的双重收费:
http://productforums.google.com/forum/#!topic/mobile/4fSzO_dhTlE
http://www.zdnet.com/blog/government/googles-response-to-at-ts-charges-on-google-voice/5501