一直都是买那种电话卡,因为跟国内主要是视频聊天,打电话不多
最开始用calling,可是calling一张卡开了之后8周之内必须用完,不然就废了
现在用China-one,通话质量还不错
Expiration of credits
A credit balance for the Rebtel Services on the Account expires 12 months after the last activity of the Rebtel Services. Credit balances that are not used within the said 12 months day period will be lost.
http://www.rebtel.com/en/Footer-link-pages/Legal-information/Terms-of-service/
so it means you can easily extend the expiry date by 12 months simply make a call.
for me, ever since I paid the first time and only time back to Sept 07, my credit is still sitting there.
they have application on iPhone, Android, mobile web site, etc. really advanced.
they have direct call, smart call(free), double dial, collect call(dial China number to reach you in Canada), so, kind of complex.
but you can try any feature suitable for you for free, even just sign up without payment. you will know the sound quality by yourself.
if you don't like the referral program, just don't click my link, type in or Google rebtel, you will enjoy it.