before you do try the Texecom tech support line. Tell em you just bought a premier and it makes no sense. See what your answers are. From that buy texecom
op you ask a forum of trade peeps they will give their advice and yourself and others reading will assume they are doing the protective thing. Some here do. Most acknowledge that those wanting to diy using pro gear will do that anyway.
no my point was you want quality in your car and your phone. If so dismiss both of your choices
Visonic and Pyronix are cheap. they do a job like cheap things do.
your not using the same logic on your security purchase that you do on your car etc
you cant compare the 2. look into wireless security on your 2 systems.
but if you want cheap then security and reliability are not top 5 on your list of requirements