Upgraded iPhone and monthly deal accordingly - data now not available for Apple Watch

[Marcj]

Updated phone - has to change from SIM only and was sent new mini 5G SIM. Apple Watch has stopped worked as cell and claims my O2 account has no data. 

“Your O2 account is not eligible to enable mobile data on your Apple Watch. Contact O2 for more information.”

I’m paying for this - how can I fix this right away?

[Cleoriff]

@Marcj 

Give O2 a call as stated. They open at 8am.

Call 202 from your mobile or 0344 809 0202

All other numbers and methods of contact are in this guide

Guide: Coronavirus Community Help and Support 

When you call, you will be asked for the reason you are calling,

Stay silent for 15 seconds and you will be taken to the keypad options.

Press 2 for Everything Else

Press 5 for More Options

Press 7 for Anything Else which will put you though to an advisor.

Press Upgrade, Lost/Stolen or Fraud if you have to.

8am is the best time to call

[MI5]

@Marcj 

Check you have a direct debit in place to pay your bills as it is a requirement for the Apple watch to register.

[Marcj · Accepted solution]

Seems my SIM swap taking the number across caused a watch hiatus. Redid the switch texts and rebooted both old phones and SIM and new phone and SIM. Watch then showed no SIM but used phone to add data plan.

All caught up now. Many thanks for all the input. Appreciated.