My girlfriend had to wear a sleep monitoring device, and the instructions also had stuff to that effect. including putting all phones in airplane mode and unplug any assistant speaker things you might have. I assume the real purpose of this is to make you actually sleep. But they claimed it was to make the data collect properly...
It’s much more just typical manufacturer trying to avoid liability. It costs them nothing to say don’t do that, and if it cuts tech support costs by 1%.
I love when I last called my cell phone carrier and they asked me to try putting my phone in airplane mode. I said "wouldn't that disconnect the call?", they went "no it will not", and guess what happened when I turned on airplane mode.
