I feel everyone's pain here... Trust me. I have a solution. Mark this thread as solved and get excited!
I also quoted what I could in case you don't feel like visiting my blog. It's not the same though
Okay so after hours and hours of frustrating research and time on the
phone with Google Apps for Business, I've found a solution to an issue
plaguing several people, including myself. When your phone or device
is stuck and associated with your Google Play account. It can get very
annoying and very messy, especially if you're a beta tester and you
just want to download an app. Before you know it, you have a hundred
devices on your Android Device Manager list.
My OCD, was KILLING me seeing phone Galaxy S5 on my business account,
instead of my personal account. Ugh. So right after getting off the
phone with Google, I kinda gave up. Read a bit more, and saw something
about the device being removed after 9 months of inactivity. So that's
some hope, I guess.
But wait! Right after I gave up, I was just browsing my account, and
light came down from the heavens...
(SKIP HERE FOR THE GOOD STUFF)
So let's begin.
If you want to remove a device from your Android Device Manager list:
Navigate to the following link on the account you would like to remove
the specific device:
Find the device that you want to remove. In my case, my Galaxy S5.
Sorry I don't have a picture of the big red remove button, because I'm
not about to risk and put myself through that hell again, but believe
me. You should be seeing it right now.
Click that button.
Go to the Android Device Manager in Google Play.
Boom! It's gone!
Yes. Just yes. Much frustration later. That's why I'm sharing this
with the internetz so maybe you won't have to go through the same