3 ms·

You can make emergency calls without a SIM card. The phone identifies itself to the network (with IMEI), even if there is no SIM. The telcos, obviously, map IME

You can make emergency calls without a SIM card. The phone identifies itself to the network (with IMEI), even if there is no SIM. The telcos, obviously, map IMEIs to SIMs. (Perhaps needless to say, but for basic operational purposes they have to quite efficiently triangulate your position, to know which cell tower to instruct your phone to use.) Having no SIM does not help you conceal your phone's location at all, only perhaps to make it harder to map it to your identity. I don't know if any location data might leak in airplane mode, but I would not be surprised if some did, for example, through NFC or Bluetooth.

Semaphor 4y ago
> I don't know if any location data might leak in airplane mode, but I would not be surprised if some did, for example, through NFC or Bluetooth. Not sure about NFC, but at least BT gets disabled in airplane mode.
- nvrspyx 4y ago
  Bluetooth stays enabled on iOS in airplane mode. You have to disable Bluetooth separately.
  - Semaphor 4y ago
    Weird choice for a "stop all radios" toggle to not stop a certain radio.
kornhole 4y ago
This depends on what airplane mode means on your phone. With GrapheneOS, airplane mode blocks baseband transmission, but you can optionally still turn on Bluetooth and/or WIFI. If you dial 911, airplane mode is immediately turned off for the call to go through and stays off until you turn it back on. WIFI triangulation or bluetooth mesh can be used for location tracking in particular areas. MAC address randomization and generic phone ID makes this more difficult, but broadcasts of known devices in WIFI or bluetooth scanning can give you away. Others may know more than me on this.
- mab122 4y ago
  > If you dial 911, airplane mode is immediately turned off for the call to go through and stays off until you turn it back on. I didn't know that, that's really smart and so simple. I like it. I don't know why such trivial thing is so amazing to me.
fsflover 4y ago
> I don't know if any location data might leak in airplane mode, but I would not be surprised if some did, for example, through NFC or Bluetooth. Which is why hardware kill switches are the future (see Librem 5 and Pinephone).
- b112 4y ago
  The future of never happen. The worlds worst privacy offenders make/sell phones. Google. Samsung. Apple. Google, no need to explain. Samsung? All their apps, their keyboard, collect, collect collect. Apple? Walled garden of share data with Apple. And beyond this, for example on Samsung builds, the GPS daemon calls home(Qualcomm? looked into it a year ago...) to update agps data, but also... provide tracking info. None of these people want hardware kill switches.
  - fsflover 4y ago
    Which is why we should support the ones I listed.
    - deleted 4y ago
      [deleted]

Semaphor 4y ago

> I don't know if any location data might leak in airplane mode, but I would not be surprised if some did, for example, through NFC or Bluetooth. Not sure about NFC, but at least BT gets disabled in airplane mode.

nvrspyx 4y ago
Bluetooth stays enabled on iOS in airplane mode. You have to disable Bluetooth separately.
- Semaphor 4y ago
  Weird choice for a "stop all radios" toggle to not stop a certain radio.

kornhole 4y ago

This depends on what airplane mode means on your phone. With GrapheneOS, airplane mode blocks baseband transmission, but you can optionally still turn on Bluetooth and/or WIFI. If you dial 911, airplane mode is immediately turned off for the call to go through and stays off until you turn it back on. WIFI triangulation or bluetooth mesh can be used for location tracking in particular areas. MAC address randomization and generic phone ID makes this more difficult, but broadcasts of known devices in WIFI or bluetooth scanning can give you away. Others may know more than me on this.

mab122 4y ago
> If you dial 911, airplane mode is immediately turned off for the call to go through and stays off until you turn it back on. I didn't know that, that's really smart and so simple. I like it. I don't know why such trivial thing is so amazing to me.

fsflover 4y ago

> I don't know if any location data might leak in airplane mode, but I would not be surprised if some did, for example, through NFC or Bluetooth. Which is why hardware kill switches are the future (see Librem 5 and Pinephone).

b112 4y ago
The future of never happen. The worlds worst privacy offenders make/sell phones. Google. Samsung. Apple. Google, no need to explain. Samsung? All their apps, their keyboard, collect, collect collect. Apple? Walled garden of share data with Apple. And beyond this, for example on Samsung builds, the GPS daemon calls home(Qualcomm? looked into it a year ago...) to update agps data, but also... provide tracking info. None of these people want hardware kill switches.
- fsflover 4y ago
  Which is why we should support the ones I listed.
  - deleted 4y ago
    [deleted]