I am bit confused about the discussion here, just wanted to check my understanding.
The "bind" process is more like registration with the user registering EITHER by phone number OR by email address - my dealer recommened I used my email address . This registration/bind process creates an account for the car on the MG servers that associates the car's VIN with that phone number or email.
Then, on ANY phone, a user can login to the app using those credentials and control the car. The act of logging in on a second (or new phone) automatically logs out the last device to login, so only one phone can have the app running at once.
So when I had a new phone the other day, I just logged in with my same email/password and the app worked.
The problem comes when you want to change the email address or phone number originally bound/registered - I think people are saying if you don't unbind then you have to contact MG. This is not something I will ever have to worry about unless I change my email address, which is unlikely because I own the domain, but will happen if I sell the car, obviously.
Have I got this right?