It used to be you could turn your phone off and remove the battery to completely kill it.
From what I understand, and I could be wrong, modern phones can be turned off but, not being able to remove the battery, it still pings local towers even though not capable of communication (because it’s off).
Yet the lone example of a very clearly premeditated attempt at violence on Jan. 6 has been nearly completely wiped from the memory of the American public. The pipe bombs discovered at the RNC and DNC aren’t mentioned in the press’s “remembrance” coverage of the day, and the federal government has hardly offered any updates on the investigation since releasing footage of the suspect, who was covered head to toe in dark clothing. Even the Jan. 6 commission, which has gone to great lengths to obtain the phone records of private citizens, doesn’t seem interested in pursuing the person behind the explosives.
What good are all of the “stingray” devices being used by Homeland Security and FSA collecting data everywhere?
Not saying that old phones did in fact ping local towers without their battery, but there was nothing preventing it.
Certain electrolytic capacitors can be can be charged, as if they were an internal battery, while charged and/or plugged into the charger. Then, yank the battery, and the phone could still do the deed.
Now, they may have or they may not have. Be aware that a transmitting phone takes up lots of power.
I worked on a device about 20 years ago that when it lossed ALL power, could transmit for hours. Of course, it was specifically designed to do so, and the enabling capacitors were quite large.