Hello people may I firstly say thank you to all the people that have already commented with advice on this issue. after hours of trying to pair and update an Apple Watch series 1 to iOS 14.3 and receiving countless errors being told I’m not connected to the internet I finally managed to solve the issue and paid and update the watch. I spent an hour on the phone with Apple and I exhausted everything I read in the comments to this thread and more including changing WiFi frequency’s from 5ghz to 2.4ghz, erasing all data and settings from the Apple Watch, reseting network settings on iPhone, using 3 different iPhones on iOS 13&14 and all the obvious resets and power cycles Nothing seemed to be working and I was about to give up and as a last effort instead of having my phone connected to WiFi or 4g cellular I connected to my iPads personal hotspot tried the update and paring process again and it worked no problem !! ( took a good while approx 2 hrs but completed successfully ) the Apple Watch had 100% battery and like I say had been reset after the anguish and stress it caused me and after reading the pain others are going through I thought I’d post. I’m not suggesting it’s a fix but being connected to the iPads personal hotpot is the only factor that changed and my watch updated worth a shot if nothing else good luck