@Meganw96 Sorry that not possible. To have the watch working with an iPhone the iPhone has to be on contract with EE. You can get a stand alone tariff for the watch but the watch will have it’s own call/text and data allowance. So any calls/texts from the watch will be from a separate number to the iPhone he currently using on Sky.
the watch also has to be added to a contract account on EE to even have this also.
You’ll probably be better off and it’ll be a lot lot cheaper in the long run of just getting a none cellular watch this can be paired with his iPhone with no issues.
To contact EE Customer Services dial 150 From your EE mobile or 0800 956 6000 from any other phone.
