Do you already have the watch? I bought the esim model from Apple when it came out figuring O2 would eventually support it, which they now do, added my watch to my tariff for £5 p/m IIRC
Thanks a lot. That sounds a lot more acceptable. I’ve bought the watch outright and just looking to add it to my monthly O2 bill but it’s not worth 20quid a month. A fiver would be fine though.