@meadxmoon no worries about not finding it, its kinda hidden in their blog: https://www.cape.co/blog/inside-capes-mobile-core

In short; they are in the middle ground of ownership. They are a "heavy" MVNO, not an MNO (like Verizon), and not a "light" MVNO (like Mint, Cricket, etc).

Unlike other MVNOs, they own the network core infrastructure, but lease the cell tower. All other MNVOs don't own their core infrastructure or SIMs, they are basically a marketing layer.

So MNOs like AT&T and Verizon own everything, and thus have some level of access to everything the MVNOs have, because they own it.

But Cape owns the network core infrastructure instead of an MNO doing it.

Thus, even though the RAN belongs to an MNO - the actual authentication and connection of service belongs solely to Cape, and not an MNO.

Since they own the SIM, that's how they are able to implement their features, such as the IMSI rotation, without any knowledge to any MNO or other company.

Hope that helps!

@mike805 Oh! And I notice you said "street action"... People are being surveiled, in mass, sitting at home. That's what this post is reacting to; go look at tech headlines.

But noticing you saw this post an immediately thought "protesters need to be put in a gulag" lets me know exactly the boot your licking.

@mike805 I'll address this, despite your dramatic and emotional reply.

There is a difference between an IMSI and IMEI.
IMEI = identifies that specific phone
IMSI = identifies you as the subscriber

IMSI tracking is a bigger threat than IMEI tracking because it directly identifies and follows the subscriber across locations and devices, whereas IMEI only tracks a piece of hardware and requires correlation to identify a person.

The IMEI only let's them know a unique phone is there, the IMSI is WHO is there.

Your advice is to not have a phone at all; as even using your phone at home is the target here. (Read the 404 post about this being done in neighborhoods). You can do that. I'm sure everyone is willing to not have a cell phone at all; super practical advice. Especially as most people need a phone to use for employment, well done.

It'd be super embarrassing if you had a phone while you just told everyone not to have one...