Because charging the mobile phone, an electrostatic magnetic field will be formed around it, and the electrostatic magnetic field will interfere with the waveform of the radio wave, which will make the medium and short wave radio sound complicated, and the sound will become fuzzy and unclear.
Therefore, when listening to the radio, stay away from electrical appliances such as chargers and fluorescent tubes.
It produces electromagnetic waves, which interfere with the electromagnetic waves generated by the radio. This has nothing to do with charging or not charging, even if you do not charge, sometimes interference will occur next to the computer.