ACZoom

For most of this year (2011), the calling card from Reliance GlobalCall has been a disaster to use. Every time I connect from the US to some number in India using their local access numbers, the audio abruptly cuts out. And there is just silence on the call. This happens anywhere from 10 seconds to 2 minutes in the call. At peak times on weekends it is really bad and cuts off in under 10-30 seconds.

Most of the "customer support" submissions on this issue never got any reply, but finally last month, they contacted me to try to fix the problem. No luck - I spent so much time on this issue, including having them monitor the call multiple times while I dialed the number, but to no avail. Their engineers could find nothing wrong. But they any went ahead and said "we fixed it" even when they never really fixed anything - the next call I made would cut out in the same manner.

So I now have a calling card that is basically dead and unusable.

Other calling cards work just fine: I had a backup card Tata trueroots which worked just fine. And now there is also Google Voice which also works without any audio cutting out or dropped call issues. Both these options are much better than Reliance in terms of call quality and connectivity, the Reliance card is just not worth it.
Prices are much better with the Google Voice product and their rates are much simpler and easier to understand than the numerous plans and options with both the Tata and Reliance products.
As for customer service, I suspect all three of these have extremely poor service - so the point is to find something that will just work, and avoid the problem calling cards.