Remove old device (old mobile phone)

Hi there,

I had the HA installed on my Samsung mobile device, and had to reinstall the complete phone, then reinstalled HA app on it.
all is fine, but HA seems to continue showing the old phone like it was still existing, with what I think are the latest data coming from it before reinstalling it :

As you can see I am sure the second line is my phone (charged at 100%)
The first line is showing the phone like charged at 92% … this one I am pretty sure is the one that was “reinstalled” and is therefore not in use anymore.

So I have 2 questions :

  1. How can I check the last time an attribute / state or whatever was changed for that one (Just for me to be sure that it is well the unused one)
  2. How can I delete this device and all linked entities ?

Many thanks !

I believe you want to follow these instructions: