On a flight 6 months ago (MEM-MSP); about 5 minutes before landing (well below 10,000) the guy sitting next to me pulls out his cell phone and calls his wife. Calls go through without issue and they chat for about 1 minute. I would have said something, but the guy had previously identified himself as a cop, so I figured it would be best to let it be...
Anyway, I am still here. Granted I had no clue what might have been going on up in the cockpit. Though we were on a 757-300 near the rear; so presumably fairly far away from most of the sensitive avionics (though I am no airplane expert, so I really don’t know).