How to Activate Airtel New 4G SIM?
Send an SMS to USSD code 121. The SMS format should be: SIM<20 digits new SIM card number of your new SIM>.
You will now receive an SMS for confirmation, so respond by 1.
After the process, you will receive an automated call to complete further steps.
Make sure all documents, like identity proof, are with you. At last, share consent by responding with 1.
If you want to know the activation process of Airtel SIM in details
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