I am using Airtel Network Sim at the beginning which gives good network strength signal but nowadays the Airtel network strength is bad and it’s often coming and going which gives irritating. When I called to my friend it is often telling that the mobile is switched off/out of coverage when I try with another network sim it’s connecting and ringing this is the bad experience which I am facing. According to the increase of customers, the Network strength is not increasing. Airtel customer service response is good but their response time for the problem is bad. Compare to other networks Airtel Charges are high.