I see in other threads references to a yahoo generated password, but I didn't go that route. I'm pretty sure I simply logged into yahoo, initially with the cox password, then went through the process of creating a new password. I may have some short-term memory loss here, but I'm pretty sure for the iPhone I just created a new mail account (Settings -> Mail -> Accounts -> Add Account -> yahoo!) and then entered my username <me>@cox.net and my new yahoo password. I can't remember if yahoo popped up a verification request, or where this might have happened since I might have had my desktop logged in, or the yahoo app on my iPhone, and I would have just approved it . . . or maybe that was just for setting up Thunderbird on my desktop!! Sorry, I should have taken notes!!