I believe Huawei phones do this on a much smaller scale.
Some Cell Phones Can Be Turned-On Remotely
Jacob Garcia
Gavin Sanchez
user! WHY THE FUCK WAS YOUR PHONE TURNED OFF? YOU'RE GOING TO JAIL!
Joseph Harris
Often in same chipset as wifi, nfc, bluetooth, and cell radio. No removal for you.
Brandon Moore
This has been the case since the AMPS days. Everyone should know all electronic devices are tracking/bugging devices.
Tyler Rodriguez
Visiting the hospital where they confiscate them from you in the ICU, officer Moishe. You should know that.
Zachary Davis
...
Nathaniel Wright
Where are you? You can buy a cheap tracphones in the US, walmart/wherever, without registering, $20 3 month use cards, no need of such homeless whatever silliness.
Lincoln Jackson
In which case it will provide evidence that you were not present.
You don't seem to appreciate how much sensor data is being recorded, all the time.
Tyler James
found the friendly neighborhood federale
he said it in an inflammatory way, and it's probably better than your run off the mill stock android, but he's not wrong. all phones are botnet, even the basic GSM phones that can barely send text messages are running proprietary firmware. the baseband firmware running on it is still proprietary and the chip could acknowledge ping signals even if the main CPU told it to shut down.
even if you built a phone completely by yourself, there are DF antennas all over various cities. ever heard of a stingray aka IMSI catcher? well, the main purpose of that thing is giving you the location of every phone in a 30km radius, and again there are a lot of these on government buildings and various places. and you can stop it, it's just built in the way mobile comms protocols work, so if you want to talk with a tower you have to more or less give out your location.
youtube.com
youtube.com