Hello.
First, you need to remove from your Bitdefender Central account the old device (the old phone) where Bitdefender Mobile Security is installed, by following these steps:
Next, uninstall Bitdefender Mobile Security from the old device (the old phone), by following these steps:
Finally, you can now install the Bitdefender Mobile Security program on the new device (the new phone), by following these steps:
Regards.
Thank you so much. 🙂