Overnight I have my Lumia 820 next to my bedside radio. Over the past few days the radio has intermittently been picking up interference from the phone (sounding a bit like an old dial-up modem connecting). Move the phone away from the radio and the interference stops. It only happened every now and again for several seconds at a time. My theory was that there was some background task on the phone which just happened to be causing the phone electronics to generate EMF in the frequency range of the radio (either in its RF or IF stages). Note that it is a UK DAB radio.
Working back through what I have changed on the phone recently the first thing I tried was turning off scheduling on the recently installed Quiet Hours app which relies on the 30 minute checking of the OS. And lo and behold the interference stopped. So I turned scheduling back on. And still no inteference. And several hours later still no interference. It could be some kind of incredible coincidence of course but I am doubting that unless someone on here can convince me different? Or has a deeper explanation of what was happening?
Working back through what I have changed on the phone recently the first thing I tried was turning off scheduling on the recently installed Quiet Hours app which relies on the 30 minute checking of the OS. And lo and behold the interference stopped. So I turned scheduling back on. And still no inteference. And several hours later still no interference. It could be some kind of incredible coincidence of course but I am doubting that unless someone on here can convince me different? Or has a deeper explanation of what was happening?