XB8 Bridge mode support

Hi, due to many security reasons I have at home, and the fact that the XB8 is a bit limited, I am told I can put my XB8 into bridge mode.

My question is, if I do change to bridge mode do I have to change from the xfi package to paying for the modem and unlimited data? Those are all I need.

Please advice best way to keep my speed of 2.1Gbps on my XB8 and get unlimited data.