How can I resolve 'Telstra account on this iPhone cannot be used to add a mobile data plan' error for Family Sharing and watch setup?
Im trying to set up Family Sharing and a watch for my child using better roaming. My phone is on a Telstra account, but the watch needs to be on better roaming yet I keep getting the error telstra account on this iPhone cannot be used to add a mobile data plan. Please help!
[Re-Titled by Moderator]