Now Upgrade your airyel 3G sim to 4G sim free and eaaily
exchange your airtel mobile SIM for a free 4G SIM
*.SMS SIM <20 digit SIM number> from your existing airtel connection to 121
*.The 20 digit SIM number is available at the back of your new SIM card
*.Reply with 1 to confirm your request
*.Wait for the phone to get disconnected from the network. Then change the SIM and switch iton to get connected again.
*.Your new 4G airtel SIM will be active within 5 minutes
*.No need to change your mobile number
*.You can also upgrade to an airtel 4G SIM at the nearest airtel store.
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