the SMS and XMPP settings are useless, all you have to do is to enable presence.
note however that, a message will be delivered to all registered devices until one replies with success.
for example, if you have 3 (A,B,C) registered devices belonging to a user with a sms enabled number,
an incoming message to that number will be delivered to the A device, if it fails, its delivered to B device , if it fails its delivered to C device, if it fails its dropped.
if device A is a yealink you may have receive the message (tho you expected it in bria).
so, i would recommend to
1) create 2 new users
2) assigned the Bria devices to those users
3) move the sms enabled numbers to those users, or get new ones
4) try it out
i have successfully worked with bria & linphone & yealink