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QQ: Can we not make mobiles without IMEI? Surely in today's time WiFi is ubiquitous and that will only increase with many cities installing city wide free WiFi.

QQ: Can we not make mobiles without IMEI? Surely in today's time WiFi is ubiquitous and that will only increase with many cities installing city wide free WiFi. A simple Internet only phone with built in Tor support can push the envelope. Most of my communication is through apps. I don't think not having a number would make a huge difference

Scoundreller 7y ago
IMEI is the phone’s unique serial number, not a phone number. But everything you said still applies: why does my phone need a serial number that it phones “home” with?
- bad_alloc 7y ago
  Probably for the same reason many technical horrors arise: It seemed reasonable at the time, it was the simplest solution, somebody added it to the spec for some reason. Then things like this get used in such a way.
- saulrh 7y ago
  For the same reason your Ethernet card and wifi chip have MAC addresses, except the cell network is a single giant address space spanning literally the entire planet. Even better, it's paid-access you wouldn't gain anything by periodically randomizing it unless you also anonymized payment. On top of all that, it's all the way down at the hardware level, and I bet that cell network equipment is sensitive enough to tell what model of phone you're using by looking at the features its silicon supports and then deanonymize you based on deviations from that model introduced by your phone case and which pocket you carry it in and how you hold it.
  - Scoundreller 7y ago
    Is this where I admit that I change my MACs whenever I can to something random when I find the option in my device config?
    - saulrh 7y ago
      Yep. Although, as I pointed out, IMEI randomization doesn't do anything if your payment and use authorization isn't also anonymous.
kalleboo 7y ago
iPod Touch?
- negamax 7y ago
  I laughed. But you are right! Thanks. Not sure how easy would it be to Tor embed it. I will check if that's possible at all

Scoundreller 7y ago

IMEI is the phone’s unique serial number, not a phone number. But everything you said still applies: why does my phone need a serial number that it phones “home” with?

bad_alloc 7y ago
Probably for the same reason many technical horrors arise: It seemed reasonable at the time, it was the simplest solution, somebody added it to the spec for some reason. Then things like this get used in such a way.
saulrh 7y ago
For the same reason your Ethernet card and wifi chip have MAC addresses, except the cell network is a single giant address space spanning literally the entire planet. Even better, it's paid-access you wouldn't gain anything by periodically randomizing it unless you also anonymized payment. On top of all that, it's all the way down at the hardware level, and I bet that cell network equipment is sensitive enough to tell what model of phone you're using by looking at the features its silicon supports and then deanonymize you based on deviations from that model introduced by your phone case and which pocket you carry it in and how you hold it.
- Scoundreller 7y ago
  Is this where I admit that I change my MACs whenever I can to something random when I find the option in my device config?
  - saulrh 7y ago
    Yep. Although, as I pointed out, IMEI randomization doesn't do anything if your payment and use authorization isn't also anonymous.

kalleboo 7y ago

iPod Touch?

negamax 7y ago
I laughed. But you are right! Thanks. Not sure how easy would it be to Tor embed it. I will check if that's possible at all