Roshan monthly 3 GB Internet Package fee is 450 AFN and available for one month use only.
How to Activate
send M3 to 555 or dial 555 and follow the IVR
How to Deactivate
send UM3 to 555 or dial 555 and follow the IVR
TERMS AND CONDITIONS
Any additional usage beyond the data included in the bundle is charged at 0.10 Afs per 10 KB.
Source Link: Roshan Official Website
Internet Setting: Roshan APN Setting