inputs.text: never lost adaptation - using telephone signal based gps left adrift signals disappeared usually worst times like night strange city put roadmate software iphone added device attach vehicle windshield use real gps sourcing terrific no disappearing phone signals no lost city high buildings wreak havoc things electronic maps updated often quickly software device coming long interstate run tasking exit seehems software fell asleep startled intrusion called service first thing usually says possible make legal u turn comes fully awake proceeds perfectly