We all know that cell phones have no effect on the on-board navigation system
Well I was identing a beacon the other day and instead of dit dah something...I got that annoying tone that you get if you put a mobile next to a radio and make a call. Quick search revealved I had left mobile on in my flight bag.
Xeque, you have a ppl. Next time you go flying, take your mobile and make call/ send a text. All you will hear on the radio is that annoying mobile tone and nothing else.