Here is the website to buy data pack for NTC mobile.
http://offer.ntc.net.np/
To use this service we need PUK number of the mobile. To get the PUK number
1. check the welcome letter that we get while receiving the SIM
2. check the back of the card containing the SIM while receiving the SIM
3. type PUK and send SMS to 1415
We can also buy data pack using NTC mobile App (Nepal Telecom) https://play.google.com/store/apps/details?id=shirantech.android.nepaltelecom&hl=en
http://offer.ntc.net.np/
To use this service we need PUK number of the mobile. To get the PUK number
1. check the welcome letter that we get while receiving the SIM
2. check the back of the card containing the SIM while receiving the SIM
3. type PUK and send SMS to 1415
We can also buy data pack using NTC mobile App (Nepal Telecom) https://play.google.com/store/apps/details?id=shirantech.android.nepaltelecom&hl=en