I noticed that you have used Jio sim on your second SIM slot. Since 4G is allowed in first SIM slot so that's why you r getting the error. Swap the SIM and the error will go away.
Thanks for Being a part of Samsung community. Would like to tell you Kindly follow the steps below to resolve your concern :- 1) Navigate to apps >> Settings >> Apps >> Tap on three dots >> Reset app preferences. 2) Please run your device in safe mode. 3) Please do reset your device on factory mode after taking the data backup Via Smart switch. Be sure to hit ? when you find an answer that works for you. Be sure to hit ♡ when you find an answer that works for you. For further assistance, you can get in touch with us via Live Chat option by following- http://livechat.support.samsung.com/Customer_new/IN. You can also connect us via Samsung Members web community by following mentioned url-https://community.samsungmembers.com/en_IN#/
