Apple ID works on my wife's Mac, but not her iPhone
I have shared a Reminders list with my wife via her Apple ID. She has access to it on her Mac, but when she tries to connect on her iPhone, she gets a message to say her password is incorrect.
Of course, the password IS correct. It's the same one she uses on her Mac.
We tried a hard reset of the iPhone, but to no avail.
Any suggestions?