I have spent a few hours trying to bind the new app to my MG Trophy. The old app gave no problems. I looked at many different sources for advice but found nothing that worked.
I have now solved the problem for myself. I hope this might help others.
In the past I must have signed into the app by using my phone number or my email address. I assumed it was two ways of accessing my MG iSmart account. I now realise by doing that I have created two accounts, no feedback appears that tells you that fact.
When trying to bind the new app using the QR code on the infotainment display, it displayed “success” but remained on the binding screen on my phone. I was using my email address to sign into my iSmart account.
Eventually, I tried signing in using my phone number. Immediately the iSmart app connected to my car without the need to bind it using the QR code. It displayed the status of my car correctly.
Therefore, my car was already bound to my account because I must have used the phone number login when I originally bound the car with the old app.
MG do not make it clear that you have to stick to either email user name or mobile number user name, otherwise you create two accounts.