I think my iPhone has been hacked

I installed a new 4G modem from our telecommunications provider today, and almost immediately after, my iPhone popped up with a Settings page (I don't remember all the details) showing a whole heap of information, including an IP address or something located in China. 

I immediately tried to log into my Norton app, but it wouldn't load up for me. I don't know if this is because there was an issue with the app, or whether I actually have been hacked.......

After nearly 20 minutes of trying, I finally got the Norton app up and running, but I don't know whether my phone has actually been hacked or not. Any advise would be greatly appreciated.