Tint and reception issues

[Onassis]

I recently got the work car wrapped in graphics and all 7 windows tinted. I seem to have issues with reception on my Navi unit and iPhone. Is there an aftermarket external antenna that can be hooked into both to boost reception ?

[SpeedIllusion]

Do you have TPMS sensors in your wheels too? I heard there is a type of tint that has some kind of metal in it(very good for blocking UV rays) that can effect all that.