If you're Admin,
- Delete or Remove yourself by login to https://portal.pdqlocks.com/ Go to Users -> User Devices
- Download the PDQ Smart App to new phone and SIGN IN with Admin credentials
- Provide new user device name after SIGN IN. PDQ Smart App will automatically get list of your SR Smart devices and you will be able operate all the devices
If you're user other than Admin,
Contact Admin of the lock and ask him to delete your user device from the account. Once the user is deleted from the SR PDQ Devices, their Smartphone will not be able to operate it.