To the best of my knowledge, the different wireless communication devices (cell phone vs wi-fi for example) transmit data at different carrier frequencies and power levels. Note that the higher its carrier frequency, the more a carrier wave travels in a given direction like a light beam. The associated problem with higher carrier frequencies that they are weakened or stopped altogether by solid objects like light beams are.
Note that cell phones can adjust the power output of their transmitting carrier wave in response to receiving signals that are strong or weak.
I understand that the weakest of the data signals are bluetooth, domesticated to be used in close proximity to humans.
Antenna shapes, sticks versus dishes for example, also affect wave shape.
Corrections on any of the these points are welcome. I’ve studied basic physics but am not a technician.
Thanks, that helps my understanding.