Law enforcement must be pushing pretty hard to get this capability available to them under a warrant, right? I assume this isn't currently a typical investigatory technique. If there anything holding back someone packaging an exploit?
If you absolutely needed the utility of a smartphone, but also somehow needed to be secure from these attack vectors, I wonder how much it helps to remove the SIM and disconnect the 3G/LTE antenna keeping only WiFi and Bluetooth radios on the smartphone, then carrying a separate LTE/WiFi bridge which is considered an untrusted device.
At least you isolate your microphone, video camera, GPS, and all that personal data. You still give off location but perhaps to a lesser extent.
In some ways forcing a bridge-only mode; it can also extend the life of the mobile. The trade off is mostly just a battery drain and overall hassle of the 2nd device I guess.
If you absolutely needed the utility of a smartphone, but also somehow needed to be secure from these attack vectors, I wonder how much it helps to remove the SIM and disconnect the 3G/LTE antenna keeping only WiFi and Bluetooth radios on the smartphone, then carrying a separate LTE/WiFi bridge which is considered an untrusted device.
At least you isolate your microphone, video camera, GPS, and all that personal data. You still give off location but perhaps to a lesser extent.
In some ways forcing a bridge-only mode; it can also extend the life of the mobile. The trade off is mostly just a battery drain and overall hassle of the 2nd device I guess.