Re:California Police Used Stingrays in Planes to Spy on Phones
by tedmiston on Wednesday January 27, 2016 @09:31PM
(#10985700)
Apparently even airplane mode might not necessarily protect you (though I don't claim to know how this works in the internals of iOS):
> Furthermore while the IMSI is not transmitted often a silent SMS or a failed call will induce the phone to transmit its IMSI or TMSI also in and out of airplane mode while registering on the network.
> Furthermore while the IMSI is not transmitted often a silent SMS or a failed call will induce the phone to transmit its IMSI or TMSI also in and out of airplane mode while registering on the network.
https://en.wikipedia.org/wiki/Talk%3AIMSI-catcher