The phone should not matter at all. If you are logged into the same Disneyland account you will see the same data: Park tickets, Lightening Lanes, Dining, Mobile key, etc. Our family all use the same account to keep it simple, rather than using different accounts and creating a "Party". As long as everyone understands any changes will affect everyone else.Thanks for the suggestions! I'll try it again tomorrow. Does it work to mirror if one is an android and one is an iPhone though?
Edit: Just reading your post again for the error "reservation does not exist" -- are you sure you have all 4/everyone setup in your DVC Member Services account, with correct spelling? Another thought: Does your husbands first/last name in his Disneyland.com account match what is on the reservation in your DVC account?
Just try to "think like a computer". Everything has to match, to find/link the reservation...