Yes, Blueface is a fully portable phone service. Traditional phone services are restricted to the geographical location where they are installed.
Blueface works over any stable broadband connection which means your call plan and phone number are not fixed to a particular place.
As a result anywhere there is a broadband connection you can use your Blueface account and make and receive phone calls.
You can have your Blueface account registered at the office, on a laptop or on a SIP enabled mobile but if you have more than one device registered with Blueface at the same time you must create a new SIP account for each one.
This will ensure you have no audio issues and good call quality.