Samsung Galaxy Note 20 Ultra Mobile Network Problem

[Millz1]

My galaxy note 20 Ultra has lost moble network. I have tried to insert a different simcard but to no avail. I have also tried to factory reset it but still no mobile network. 

As you can see,flight mode is auto enabled and it wont turn off. How can I fix this problem?

[Millz1]

I tried all this even factory reset but to no avail

[ngonidzashe-A15]

When did this error happen ? ,was it after a security update

[Millz1]

It was just random. I just woke up to a phone without mobile network connection. The only incident I can remember was that it dropped in water in a about a month ago but it was working just fine afterwards until just now

[ngonidzashe-A15]

If you go to your settings > connections> sim manager , are your lines activated ,, kindly share that option

[Millz1]

It does not have Sim manager because it's a single sim

[ngonidzashe-A15]

So maybe the cellular radio or a faulty power button, is forcing the system into Airplane Mode. Have u tried running a diagnostic test thru Samsung Members, and or

Hard resetting it

Turn off the phone.Press and hold Volume Up + Power button until the recovery menu appears.
Use the volume keys to navigate to Wipe cache partition and press the power button to select it.