You change the length of the conductor, most likely resulting in the length no longer being an equally divisible fraction of the wavelength(s) being sent/received. Aka the antenna no longer functions.
The device may however not need the antenna, which could just provide better quality signal than without, but regardless, if the antenna co doctor isn’t an appropriate length, and tmits plugged into the RF antenna port, it’s likely going to result in a non functioning cellular device.
You change the length of the conductor, most likely resulting in the length no longer being an equally divisible fraction of the wavelength(s) being sent/received. Aka the antenna no longer functions.
The device may however not need the antenna, which could just provide better quality signal than without, but regardless, if the antenna co doctor isn’t an appropriate length, and tmits plugged into the RF antenna port, it’s likely going to result in a non functioning cellular device.
Or if the car can’t phone home it won’t start. Too bad for you if you stop somewhere where cell service is weak or nonexistent.