Sajha Users, I suggest you not to buy calling cards from SDI cards. I always used to buy from them since 2 years. This time I had bought 5 cards for $ 2 each to call to Nepal, supposed to give 37 minutes per their website. 1 card gave me about that time. And today I tried the other one and says 13 minutes with $ 2 balance. I called customer service after about 10 minutes waiting time and they say that it's only 13 minutes if it says 13 minutes. They could do nothing. Hate their service, still the website says 37 minutes.