Samsung S10 lite - light blue airplane mode

[S10 lite use]

My samsung S 10 lite phone suddenly went into no coverage mode and when I checked I found airplane mode (flight mode) is in light blue color. I tried multiple time to restart, took out sim card but nothing seems to be working.

I installed my smart watch app yesterday and the problem started after that. Today morning I uninstalled that app and restarted my phone but still problem remains.

I also tried restarting the phone in "Safe mode", switching off with phone with airplane mode on  but nothing helped to resolve the problem. 

Did someone got solution to this problem ?

[Ventor]

@S10 lite use Hello, try Reset your phone's network settings. To do this, go to Settings / General Administration / Reset and reset the network settings. Check. Greeting

[S10 lite use]

Dear @Ventor , it didnt helped. I did network setting reset and it didnt work. I tried doing all setting reset as well after that and it didnt help as well. 

I checked on internet and this issue has been around for long time. Does anybody have ever got this problem resolved ?