Record type	Item or check	Setup / instruction	Observed value or result	Call-device selection	Prompts / notes
Setup	Vehicle model / year / region				
Setup	Head unit model / software				
Setup	Phone A model / Android / Android Auto versions				
Setup	Phone B model / Android / Android Auto versions				
Setup	Adapter model / app / firmware (if used)				
Setup	Connection mode				
Setup	Documented startup preference and source				
Setup	Documented manual switch action and source				
Setup	Normal shutdown / restart procedure				
Observation	A alone	Only A available			
Observation	B alone	Only B available			
Observation	Both after A	Use A; normal shutdown; restart with both			
Observation	Both after B	Use B; normal shutdown; restart with both			
Observation	Manual handover	Use documented selector while parked			
Observation	Next ordinary start	Leave agreed settings unchanged			
Reminder	Blank = untested	Suggested parked reader check; no site test results