There is no way to stop it - there is no "PTT Block". Boost mobile was set up as a MVNO service provider - and they don't make any money on those of us that use them as GPS trackers only - actually - they LOOSE money...
One of the features our special board offers - is that it keeps the phone off when there is no motion of the target vehicle. While this does not solve the issue of people calling you - it does make it LESS likely for them to get through - since the phone is only on a short period of time - and NOT all the time.
With our board you get LONGER battery times, LESS wrong numbers and 2-way contacts, and we clear out the text and error messages upon boot-up - making the unit a much better tracking device to use with AccuTracking service.
Our standard internal i425 solution will give you 2-3 days of "standard drive time" if used as a car tracker - which is MUCH BETTER than the typical 8 hours of "use".
Our extended solution will offer 3-4 weeks on average.