If you want to register a new mobile to a previous account you need first of all to install the app on the new mobile. Therefore, browse with your mobile to Google Play. Download and install the Avira Free Security Android app on your device.
If your installation was successful continue with the registration. During the registration it is required to provide a valid Google account or email address.
If you use the previous email account for the registration, you will receive a confirmation Email at that address, confirming the registration of the new device to your existing Avira Free Android Security Account.
After the login into the Web Console, the new mobile has been added to the section „All your devices“ on the left hand side of the Web Console.
One account can manage up to 5 different devices. In case you would like to add the sixth device to the same account, you may delete the app from one of the already registered mobiles.