Android

31126 readers

4 users here now

DROID DOES

Welcome to the droidymcdroidface-iest, Lemmyest (Lemmiest), test, bestest, phoniest, pluckiest, snarkiest, and spiciest Android community on Lemmy (Do not respond)! Here you can participate in amazing discussions and events relating to all things Android.

The rules for posting and commenting, besides the rules defined here for lemmy.world, are as follows:

Rules

1. All posts must be relevant to Android devices/operating system.

2. Posts cannot be illegal or NSFW material.

3. No spam, self promotion, or upvote farming. Sources engaging in these behavior will be added to the Blacklist.

4. Non-whitelisted bots will be banned.

5. Engage respectfully: Harassment, flamebaiting, bad faith engagement, or agenda posting will result in your posts being removed. Excessive violations will result in temporary or permanent ban, depending on severity.

6. Memes are not allowed to be posts, but are allowed in the comments.

7. Posts from clickbait sources are heavily discouraged. Please de-clickbait titles if it needs to be submitted.

8. Submission statements of any length composed of your own thoughts inside the post text field are mandatory for any microblog posts, and are optional but recommended for article/image/video posts.

Community Resources:

We are Android girls*,

In our Lemmy.world.

The back is plastic,

It's fantastic.

*Well, not just girls: people of all gender identities are welcomed here.

Our Partner Communities:

[email protected]

founded 2 years ago

MODERATORS

[email protected]

The network can see your imei and triangulate your location as long as your radio is on (lemmy.world)

submitted 2 weeks ago* (last edited 2 weeks ago) by [email protected] to c/[email protected]

19 comments fedilink hide all child comments

https://discuss.grapheneos.org/d/7710-changing-imei/8

A phone doesnt need a sim to connect to the network towers. Sim is only for billing. The network can see your imei and triangulate your location as long as your radio is on.

I have read this on https://discuss.grapheneos.org/d/7710-changing-imei/8, but I'm bit confused. Does this mean our IMEI is identified by cell tower as long as the airplane mode is off? What exact setting is "Radio" referring to?

thanks a lot

thanks @[email protected] and @[email protected]

Short answer: Yes The network can see your IMEI and triangulate your location even though no SIM is installed. and theoretically with airplane mode off no radio is on

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 0 points 2 weeks ago (1 children)

Put simply the radio broadcasts a sort of hello message to the tower so the tower knows where to listen (this is about signal direction or beam shaping, but imagine the eye of Sauron swiveling to see Frodo). This includes the identifier of the handset, the IMEI number, so that the tower can keep track of who is who. The second step of getting connected to the network is done with the details inside the SIM card, specifically the IMSI number.

If your phone has no SIM card you can still make an emergency call. You can also have an eSIM which is a software version of the SIM card. In both cases you can bypass the SIM and get connected.

If you turn airplane mode on the radio is powered off in theory, but this is not absolutely guaranteed. It should be off, the system will report it is off, but there are fringe cases where it may still be very slightly active, usually from malware or similar things.

So no SIM means no IMSI, but the radio itself has the IMEI and that handset is hard coded to that identifier. If the radio powers on it will broadcast the IMEI to negotiate connection with or without the SIM and IMSI.

[–] [email protected] 0 points 2 weeks ago

thanks a lot that is a very clear explanation