[jsheard]

A device may be required to not malfunction due to interference, but it can't be required to function in the presence of interference because that's a technical impossibility if the interference is strong enough to overpower the intended signal. That's why there are laws which say that if you use something like the Flipper as an RF jammer (which is possible with custom firmware) then angry feds might show up at your house.

[wezdog1]

For medical devices, lack of function would be malfunction

[crest]

For any sane medical device radio interference should at most degrade non-essential functions e.g. uploading of medical data, inspecting the battery status from your phone. If such functions are important and unavailable for extended periods the device should give audible/visual alarms.