Cell phone or qc. It's all a business tax write off. I don't use a qc. My carrier I drive for emails the load info after they call me to see if I want it. They have no clue if I moved from 1 truck stop to Walmart etc. I tell them what town with in so many miles I'm in. Panther used to bump me if I was 1st out an moved 3 miles to a Walmart. That qc tracks every move you make. Just like electronic logging. The plus is. What ever it does cost either phone or qc. It's all a business tax write off.