Check Your Number in Settings: Insert the SIM Card into your Phone or scan the QR code if it is an e-SIM. Navigate to the ... There are several ways to check your Airtel mobile number using ...

Sometimes you might not be able to use Airtel 4G on your 4G ready smartphone. In this case, the problem can be with your SIM card. It only means that you are still using only 2G or 3G SIM.