I use Stana card because of good connection, and comparatively cheaper price. Could talk as much or as less as I want. Initially you get $10.00 for $10.00 bonus. If you refer you and your friend both gets bonus. I get 68 minutes for $10.00 on land line to Kathamndu but with referral you can get double for the first credit that is 136 minutes. No need to dial the pin or destination number just dial the local number.  Minutes does not decrease if other side is not connected. Could talk one minutes or as long as you want, Its very easy and connection is very good. Its worth buying. I have used Rebtel and all other cards but I can guarantee this is the best one.  http://www.stanacard.com/?ref=272531