inputs.text: poor took notice previous rewieves - 43 inch gps car navigation systehem charging 24 hours no green light come tried switch anyway nothing no home charger use engine jump start battery 12 volt type socket car power car jump starter also plugged main power make sure full charge also believe supposed sim card cannot see one not want mess satnav get itehem charge least partly charged put charge ready use 2hours want try get itehem exchanged one works money back difficulty wit