Z1596700488907 , via OnePlus Nord , Oct 18, 2020 at 9:29 AM : I have recently updated to OS 10.5.8. initially mobile is running smoothly. Today i have switched my data from sim2 to sim1. After running some time i have lost slot1 signal. Now I'm unable use that sim1 slot. So i have Googled about this there i have found that *#*#4636#*#* bye dialing this number ut displayed phone information there network type is showing unknown. But it comes slot 2 it's showing LTE.. please Help me out regarding this.