I purchased a calling plan to Nepal from US from talktonepal.com. In the beginning, they were offering a handsome call tariff of some 5.9 cents per minute to Kathmandu landlines. I was the user who used about 100 minutes of landline calls everyday to Kathmandu, and it was for about 1 month already.
One day I noticed that my account was debited at the rate of 10.9 cents/minutes for the aforementioned call. They never informed me of this, even though I was an everyday user. I emailed them but they never gave a satisfactory answer as to why I was uninformed of this ahead of time. Instead they started saying the "terms and conditions" I accepted while signing up allows them to raise the call rates anytime w/o prior notice!
Please be aware of this calling plan from talktonepal.com!!!