Airtel
Need to trace unwanted calls

Hi

I have a Airtel number where in, i have been getting unsolicited and abusive calls from a number which is never displayed on my display (Nokia 6610). As far as i know CLIR (Calling line identification Restriction) is activated on the caller's phone.

i'm just wondering if it is possible to identify the number of the person. Does anyone have any info about this?

Please Help