...
To provision a Bria softphone, in sipXecs Administration click on Devices -> Phones and then select Bria 3.x from the Add new phone... drop-down box. Only the Bria 3.x is capable of being auto provisioned. The iPhone, iPad and Android editions do not have this feature from Counterpath.
The Serial number entry can be a user name or extension. It really doesn't matter what it is. Enter a useful description and if you'd like to manage your Bria Pro phone settings as a group, add a Group name.
...