Can Old Nokia Phone Receive Calls from Unknown Number Without SIM Card? Operator Involvement?

There are things that physiologists have not dreamed of
I have been using cells for over 20 years and such things have never happened to me
They were in every Polish roaming network, etc., I can not count models and brands.
You can see the pollen that no one wants to eavesdrop on me

Maybe we will stay that this behavior of the phone is due to operator errors (only the question, since there is no SIM card).
We can theorize for a long time about wiretaps. There are probably tools in the hands of richer countries that enable them to do so, including computer analysis and segregation of conversations for those that are worth being interested in and that are of little interest. All these, however, will be our assumptions and wonders.

The telemarketers called, they never give up :-)

Seriously, this is a network bug.

pikarel wrote:

the encryption methods used guarantee that even if someone managed to intercept the data stream, its reading will take up to 50 years

Enigma was also supposed to be unbreakable and it was broken in times when there were no computers.

There were no computers, but there were mathematicians.

[Q] wrote:

As far as I know, the Americans in Germany near Manncheim have their European headquarters for data processing and analysis.

And I just spoke twice on WhatsApp to a friend in Mannheim when there was a teaspoon tapping against a glass
I don't think they suspect him of terrorism

[Q] wrote:

There were no computers but there were mathematicians.

Yeah. But now there are mathematicians and computers with great computing power. Such a computer will do as many operations per second as a mathematician in millions of years. Of course, a mathematician needs to enter what the computer should calculate.

I suspect that with the current number of mobile phones, there are those with the same IMEI number. For this reason, such circuses can arise. The sim card is only such an account status identifier and personal data.

There used to be similar circuses with telephone numbers, when the networks stuck to the hallmarks, e.g. Orange numbers started with 5. The expired number was sold again, but it was possible to activate the expired one and thus there were 2 identical numbers. on the Web. Experience the popular phenomenon of his time in some Heya networks.
Currently, calls are identified after no. chip in the SIM, which is much longer (unique), so we can choose the phone number ourselves, e.g. in Orange. When replacing the SIM card, our phone number is paired with a different chip number.
Probably now it is similar with the IMEI number, everyone has a few phones in the drawer that have not been used for several years, therefore new phones may have the same IMEI.

I omit the possibility of changing the IMEI number, which is illegal just because of the possibility of eavesdropping on others.

It is not possible to manufacture phones with identical IMEIs , production of identical SIM cards, it is also not possible to generate the same numbers of top-up codes.
Such data is licensed (number groups), access and distribution are strictly controlled by appropriate systems.
Something "double" in trade - it's just the actions of fraudsters.
An intermediate hacker knows how to distribute such distributions.

If someone says otherwise - he has the way of thinking of someone who sums up his own computer errors with a simple statement:
I made a mistake with the computer :)

Own previous conversation, audible on the phone, allows you to record this conversation as information, e.g. by pressing an unknown key combination.

pikarel wrote:

It is not possible to produce phones with identical IMEIs,

But there is / was a creative method for removing a phone from the "black list". I do not mean that there is something wrong with the author's phone, rather there is a possibility that his IMEI number was in some other device as a result of "whitening the phone".

And two the same IMEI numbers once worked quietly at the same time (the beginnings of GSM in Poland), I do not know how now.

[quote = "sanfran"]

pikarel wrote:

And two the same IMEI numbers once worked quietly at the same time (the beginnings of GSM in Poland), I do not know how now.

Nothing has changed here. Moreover, you can find various Chinese brands or fakes where hundreds of phones work with the same IMEI.

As for WhatsApp, I would rather blame some error related to audio compression or connection to the internet on which page.

I do not even talk about WhatsApp, because it is nonsense in the era of digital audio transmission to think that someone wanted to capture, decode, mix with their sound and re-encode a data stream. If anything, a copy of the conversation is somewhere on some disk and will be used when needed.
Besides, WhatsApp has a terrible call quality compared to other digital messages. If I were to step up WiFi calls from the best to the worst quality (with the same network conditions), it looks like this:
1. WiFi Calling
2. FaceTime (audio only)
3. Skype
4. WhatsApp

blahfff wrote:

(...) you can find various Chinese brands or fakes, where hundreds of phones work with the same IMEI. (...)

I wrote about normal producers, not cheats.

pikarel wrote:

It is not possible to manufacture phones with identical IMEIs , production of identical SIM cards, it is also not possible to generate the same numbers of top-up codes.
Such data is licensed (number groups), access and distribution are strictly controlled by the respective systems. (...)

not about chńszczyzna from an unknown source.

You can't be 100% sure these days. Branded phones are also refurbished in China and hit the European market. Such renewal may also include changing the IMEI (i.e. legalizing the phone from a dubious source).

With this identical IMEI, from what I associate, in order to eavesdrop on someone, both phones had to be logged into the same antenna.


There used to be online services where you could check the IMEI to which phone model it is assigned.

E8600 wrote:

(...) Branded phones are also refurbished in China and hit the European market. Such renewal may also include changing the IMEI (i.e. legalizing a phone from a dubious source ).
(...)

You are also eating a scammer.
No producer does this because there is no justification for it.

pikarel wrote:

You are also eating a scammer.
No manufacturer does that.

That's right, but such phones are normally available on our market. People buy cheaper anywhere without checking the source. Some newest refurbished flagship from China costs 30% less than on our market. Formerly, the hallmark were non-original accessories such as a charger / headphones, but today it is difficult to distinguish.

If I would decide to buy a cheap phone from China - I would only buy an original Chinese product.
It is cheaper and, above all, new.
A friend of mine did that; he bought three phones from China - for himself and two sons - for the price of one S7.
In addition, in "those pinsiądz" they got a case and glass for a hundred years of use
most importantly, that each of them is satisfied with the operation of the phone.
I wish I remembered what brand it was.

Edition:
This is not Xiaomi, the name is shorter

Xiaomi probably.