Don't have tech package so using a 1+ year old Garmin (Nuvi 1450T). The Garmin frequently says it can't locate the satellite. Presumably due to the coating I've heard about on MS's windshield? iPhone/Waze doesn't report can't find satellite but would go through short periods of losing your location. From a thread on the windshield coating, I see the only place that doesn't block RF is near the rear view mirror so getting an external antenna to this location maybe required Coated windshield impacting door openers and EZpass Anyone found other solutions? I prefer not setup an external antenna if possible.