I was able to pair my cell phone with my tablet but nothing I can do past that. Is there a Cell Phone App that will allow you to send text or talk from your cell phone? I don't have a smart phone but what I have works fine with the Bluetooth hands free in my Toyota.
If you use Google Voice there are apps that let you send and receive texts through that number which can be linked to your phone or directly from a PC or tablet. I am not aware of any app that let's you pair with the phone and then create and send or receive texts on the tablet via the phone itself.
For the longest time with Ericsson, Sony Ericssson, I have used float's Mobile Agent. If that is what you meant, I don't think I've seen one for the Surface RT.