[Q] Unable to get 3G Airtel in Ooneplus One topic

Hello,

Can anyone help me please? I am using the Oneplus One with Airtel SIM, but the mobile internet is intermittent. Its not able to hold on the GPRS on a continious way. Tried with Vodafone SIM as well, but does not work. The network is currently selected as LTE. Tried the other available options of 3G and 2G.

Thanks