How to Activate Airtel 4G For Free: Hiii this is JAYA from TELUGU TECH. In this video how to activate airtel 4g sim from 3g/2g(already existing sim only). STEP-1: SEND AN TEXT MESG TO 121 LIKE THIS [SIM 20 digit number] STEP-2: SEND 1 TO ACTIVATE AIRTEL-4G SIM. FOLLWS ON FACEBOOK-https://www.facebook.com/telugutech4u SUBSCRIBE FOR MORE VIDEOS.
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