Airtel — Internet connection problem

Address:

Jhajjar, Haryana, 124106

Hello, I want to complain about my bad internet connection. I have two sim of airtel. Both are in my phone. One is showing 2G network while other is showing 3G network. I change their slot also. But it is showing 2G.Please reset my network setting of mobile no.[protected].
Both are 4G Sims.