Originally Posted by AnemicOak
Mine were all set up by default as well, but my iPhone does have an email address.
Bizarre. Clicking Edit on any of the devices on my account (pictured below) just allows me to change the name of the device.
Clicking on the link for Personal Document settings, this is what I see:
There is no place to add a new device.
The help page for this topic on Amazon is blank: