How To Stop Company Call ( idea , vodafone , jio , Bsnl ) | Activate DND | Block Unwanted Calls

dosto is video main maine bataya hai aap kaise customer care ke calls ko block kar sakta hai..so video ko end tak dakhta rahiya Queries Solved: 1) Activate DND to BLOCK SMS & CALLS 2) START or STOP DND services 3) What is TRAI Telecom Regulatory Authority of India, Government of India, GOI, Telecom, Broadcasting, Consumer, UCC, Broadband, Spectrum 4) What is Do not disturb service in india 5) How DND & NonDND System works in mobile operators 6) DND can be active in these mobile operator: AIRTEL, IDEA, RELIANCE JIO, VODAFONE, BSNL, , 7)company call kaise band kare