Don't know if this is true for all vehicles. Pero nung nasa States ako last April ay naiwan ko yung susi ng rental car (Chevy Classic) inside the car. Nagmamadali ako noon that time and hindi ko napansin na napindot ko yung lock button sa keyless entry when I was busy and sinara ko yung pinto. Laking gulat ko nung makita kong naka-lock pala lahat ng doors and naka-ilaw yung alarm indicator and nasa loob yung susi . Since rental car siya wala akong duplicate and I had to call the car rental company. May dumating na dalawang locksmith, yung isa yata tine-train... May dala silang manual containing the diagram of the door panels ng different car makes and ng mahanap nila at matingnan yung diagram noong car model nilabas na nila yung pansungkit nila along with a rubber tool na pang-buka noong rubber molding sa window. Sinabi noong isa sa tinuturuan niya na "use the passenger side" (I don't know bakit hindi puwede sa driver's side hindi ko naitanong) and it took less than 5 seconds for the trainee to open the door.... and hindi nag-alarm ...

Simula noon, talagang nawala na yung kumpiyansa ko sa basta alarm lang (medyo wala na nga noon that time because of what I have been reading in the forums...hehe) kasi nakita ko first-hand kung paano nabuksan yung kotse na may alarm in a few seconds. Kaya ngayon I make it a point to put on a lock (kung dalawa mas okey) whenever I park outside even if I know I will be gone for only a couple of minutes.