raginmarialazer , via OnePlus 6 , Jul 3, 2020 : I am using my oneplus 6 for 2 years and it was working fine. A week back I noticed that my siim 2 network is empty. Showing emergency calls only. It was Bsnl 3G sim. I tried the sim with another device and it worked. So I ported bsnl to Airtel 4G. Then the issue was resolved for a while but that was not permanent. Now the network for Airtel 4G sim in slot 2 goes empty frequently and when i toggle flight mode it gets restored again. Signal strength is good for both bsnl and Airtel in my location and no issues with other devices. Facing much difficulty due to this issue. Please look into this and help me to resolve. Herewith I attach the screenshot for reference.