According to: The fob that you carry on your keychain or use to open the garage door is actually a small radio transmitter. When you push a button on the fob, you turn on the transmitter and it sends a code to the receiver (either in the car or in the garage). Inside the car or garage is a radio receiver tuned to the frequency that the transmitter is using (300 or 400 MHz is typical for modern systems). And, from on Wikipedia: The telephone [. How To Unlock Iphone 7 Plus Activation Lock on this page. ] is a telecommunications device that transmits and receives sound, most commonly the human voice. And again, from: To start with, one of the most interesting things about a cell phone is that it is actually a radio -- an extremely sophisticated radio, but a radio nonetheless. How To Unlock Iphone 5 With Broken Touch Screen on this page.
But, nevertheless, a cell phone intentionally transmits on. So, even though both cell phones and keyless entry remotes are radios, there are two main reasons why this is not possible: • From the transmission end of the call, only audio is transmitted onto the phone network (via microphone into an analog signal and then via electronic components to a digital signal, if a digital cell phone is used). Are light, and are not audible.