I am trying to use the Verizon Cloud app on iPhone6. I had used it before to transfer contacts on my new phone, but trying to sign into it so I can sync it to the Verizon Messenger app on my tablet is proving impossible. It keeps telling me it doesn't recognize my sign on, but I am able to sign onto my Verizon account online. I've deleted and redownloaded twice and changed my password through the app, but it just goes through to a blank screen that says "My Verizon." I am extremely frustrated!!! Help please?