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My 2nd favourite was with GSM mobile devices - and my car radio - inevitably immediately before getting a call, or TXT message (or email on my Blackberry), if I

My 2nd favourite was with GSM mobile devices - and my car radio - inevitably immediately before getting a call, or TXT message (or email on my Blackberry), if I was in my car and had the radio going, I would get a little "dit-dit-dit" preamble and know that something was incoming... I remember this happening all the time in meetings. Every few minutes, the conversation would stop because a phone call was coming in and all the conference room phones started buzzing. One of those things that just fades away so you don't notice it coming to an end.

mrandish 2y ago
At a certain large tech company, at the peak of GSM data-capable phones (eg Palm Treo, Blackberry) it was accepted practice for everyone turn off data or leave their phone on a side table due to conference speaker phones on the tables amplifying the data. Also, during this era I was on a flight and the pilot came over the PA right before pushing from the gate saying exasperatedly "Please turn your damn phones off!" (I assumed the same RF noise was leaking into his then-unsheilded headset).
MBCook 2y ago
The “GSM chirp”. I never got to hear it much because my family happened to use CDMA phones in that era, but I do remember hearing it a few times. I know it was well known. I haven’t thought about that in a long time.