I'm using simbase in an Ardusimple 4GNTRIP Master.  I tried with several other budget SIM cards and really struggled to maintain and RTK fix even though the unit kept a stable connection to my caster.  I came to learn that the real cheap sim cards are often routed through foreign servers and/or not give priority on the cellular network and my data packets were coming in the wrong order.  The Simbase card isn't perfect but it works perfectly fine for guidance and applications.  I'm not sure it would work for scraper/vertical control.