I followed the basic setup proceedure - everything worked perfectly aside from having to select the mobile network on my watch settings and being prompted for a reboot. I have 4g on the watch. Happy!
I didn't really have to arse about at all - i installed the wearable app from play and it did the rest
What phone do you have if you don't me asking - I am looking to get a 4g version for myself. I have a one plus 6T on EE so hoping it will also work?