Airtel Prepaid
No mobile signals in office

I work in sushruta trauma centre 9 metcalf road delhi-54. there are absolutely no mobile signals in the building and around the hospital, whereas signals of every other operator is coming except airtel.

its a kind of bizarre yet emergency situation which might force me to change the operator which i personally dont want to, but many in my office are thinking on the line.

kindly respond at the earliest.

thanks!