How to get a signal from a cell phone?

Question

mobile connection

The task is to track signals from cell phones in a certain place, track either a number or imei, or alternative data that will distinguish one cell phone from another

Answer 1

I must say right away that as a mere mortal you will not be able to do this. The phone transmits IMEI to its system, and do not think that it is in some kind of open analog version. I can write a ton of information here, but it's impossible to explain within the scope of an answer. Although the phone is a radio-electronic device, even if you take direction finding (for this they can knock on the head with real consequences from the FSB), you will never know by signal what kind of phone it is, what subscriber number and IMEI. Moreover, you will not even be able to understand what this phone "does" on the network (location update, calls, etc.). Moreover, the phone often performs handover between the bases, and this process is controlled by the BSC (RNC) - the base controller.
Yes, of course, not without holes - you can buy the so-called. Femto-Cell, flash it by analogy with a mobile operator (to get information, you will need to rent agent 007, who will get all this for you) - then you can deceive the device by passing off your cell as the cell of the operator with the best signal. In this case, the device will try to "register" in your cell (here I omit a ton of details).
But for Femto-Cell you will sit down for a couple of years with confiscation, I guarantee.

Answer 2

https://habr.com/ru/post/268127/

Answer 3

Let's start from the beginning.
Is it an abstract interest "I want a magic penyake to be like James Bond", or do you have a task that is in demand in real life, for example, to calculate how many owners of iPhones of such and such a model pass next to your fashion boutique?