You can always see the number of the person calling you on the display of your Airtel mobile phone.

When you see who is calling, you can decide whether to answer or not. If you don't want to take the call, it is automatically transferred to your Voicemail if you have Voicemail activated on your Airtel phone. That way, you can reply when it suits you.

You can prevent your number from showing on someone else's mobile phone when you call them.

To hide your number for each call, dial #31#recepient's number.

To stop your number showing permanently, please call Customer Care and ask them to set up this option for you.