I am a hotel waiter and often help guests warm their cars, but some cars are unlocked by remote control. I can't drive. Who can teach me how to remotely unlock all kinds of cars?

If it is a big button, press it for no more than two seconds at a time. It opened before it broke down. If you open the suitcase by mistake, just remember to lock it for others. The point is that your question is very general. The remote controller is divided into rear and original cars, and the button icons are divided into pictographs and English letters. It's hard to answer them all. Ideographic characters are mainly signs of unlocking and locking, and letters are locking and locking, which are roughly the same. Usually, the larger button in the button shape is open and the smaller button is locked. If anti-theft devices are installed behind multiple buttons, try not to press the smaller buttons at will. Some small buttons may be started by remote control, or looking for a car by sound and light, which may lead to a crash or a horn screaming.