Brand new Pixel 9a, Pixel Watch 3 LTE, monthly SIM card. Watch and phone updated to latest software before I attempted setting up the eSIM.
Appeared to go OK: clicked the workflow from within the Google Watch App, logged into the Three webpages and agreed to the £7pm add-on. Last page failed with something about a REGEX (no screenshot unfotunately)
Watch showed it had a Three esim with ICCID but no service at all.
Reset watch entirely per customer support advice and tried again, now I get "E53305 - You already have a paired device'. They say the sim activation is still 'in progress' but it's been 24hours and it's clearly in some undefined state. Watch currently has no esim as I can't get past the screen above.
The three app shows the two contracts and they both have the same number.
Any advice much appreciated as this is a gift for my son for Christmas. He's not getting the phone itself but the watch only so it's entirely useless unless I can get this working!
