Activate BSNL Call Forwarding, Divert Calls to Mobile/Landline

How to divert voice calls from my BSNL number to other number, and how to cancel the call forwarding in Android / iOS and Feature phone, Is the facilities provided at free of cost or chargeable, What...

source https://bsnlteleservices.com/activate-bsnl-call-forwarding-divert-mobile-voice-calls/