How To Check Airtel Number
To know your Airtel mobile number, switch on your phone, insert your Airtel sim and then Dial *121#, then 3, and enter 4. Or dial *121# >> 3 >> 4.
Immediately, a pop-up message will appear on your screen confirming your number.
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There are other ways to know your Airtel number, recharge your SIM with either N100 or so. Use that SIM and flash a nearby number and your Airtel number will appear.