Interference

Jef Mallet's Frazz having an embarrassing moment revealing his dependency on electronic devices.  But the strange thing is that this strip was from 2010... when it would have been possible to get the GPS on the smart phone... and probably a heart monitor app as well... and phones didn't interfere with those other devices anyway.  

I dunno, but I think Mallet may have wither stretched the tech point a little too far in an attempts at a punchline, or he could be revealing his own gaps in tech knowledge.