OK, well as this may be a situation a lot of people are finding themselves in with the new Apple Watch out soon, I thought I’d document my experience. When I got my new watch I phoned EE as suggested. Rather than just transfer my plan over, the person I got through to said they would need to cancel my existing plan and start a new one, then said I would need my “ED number or something” (meaning my EID, which clearly she wasn’t familiar with. Then when I asked if it would be the same price she said “yeah, thereabouts” (she eventually sorted out this would be £7, the same as usual, but again wasn’t familiar with it).
Anyway, went through the process and waited a few hours for the account to activate. Then I checked on my EE app, and lo and behold my new account had been set up as a standalone family plan watch account, so wouldn’t link to my phone. I’m now talking to someone from the technical support team (who thankfully really knows what they’re on about) to try and fix it. My advice though is do NOT phone general customer services, or the 0800 number that some people give out on this forum for the Apple Watch team (which is a sales team, or at least diverts to the sales team at the weekend). It also won’t work if you just try and do it on the watch app on your phone. Phone 150 and keep clicking through the options to get through to the technical support team and explain you’re just wanting to swap the account linked to your phone to a new watch, not add a second family plan one. They should be able to sort it for you with the right account, and fix it if you’ve been allocated the wrong account like me.
I’m now waiting for my new watch account to swap over and hopefully that’ll be the end of it, but just beware it’s quite the clumsy process - and if you get a person who isn’t clued up it can be more complex than it needs be (no criticism of the first person I dealt with - they just clearly didn’t have any training or documentation to know what to sort out and how).
