Airtel — communication issue

Address:

near MPDO Office, Anantapur, Andhra Pradesh, 515110

We are having 8 CUG numbers which are given by higher authorities. but every sim having communication problem in all areas means at office location and home location which are having around 100 km distance. the clear problem is when we got incoming call my voice is not audible to others(dialed person). there is no problem in outgoing.