I was browsing the news at night and saw a post about how he got a 96110 inquiry call from the anti-fraud center after he put a gg UK phone card, which should say giffgaff phone, into his domestic phone.

After seeing the post, the first reaction is that the person described this thing is doubtful, the reason why less credible is not that the technology can not be realized, but the cost is too poor.

The cost of realizing this thing in exchange for just finding a cell phone to put overseas phone cards, even if the punishment is not much serious, nowadays the economic situation is not good, the funds of these departments are not generous, what needs to be done is to focus on the "human resources" to do the "big case", which is the key to the performance of the KPIs. This is the key to the performance of KPIs.

Today using this blog post I recently wrote about automatically translating multiple languages and posting YouTube's platform features, I'm going to talk about what exactly are the ways in which you can be found out that you have an overseas calling card in your cell phone:

First of all, the most noteworthy is the "anti-fraud app", through the app is the easiest way to realize the identification of the sim card. In order to run some apps, both android and ios provide a service interface to read the belonging information of the sim card.

The one that utilizes this feature to the extreme is TikTok, and no matter which proxy you use in China, if you don't put an overseas calling card for it to recognize, it will always give you a black screen. That's why it's important not to install software that you can do without.

The second is the cell phone manufacturer, we give all our information to the cell phone, it is entirely possible to see where our sim card comes from, the card change alarm in the cell phone anti-theft, is the cell phone operating system to monitor the sim. But here is still the problem of cost, tens of millions of cell phone stock, at this stage, cell phone manufacturers will not pay attention to sim card slot is not put into a British phone card. In addition from the interests of cell phone manufacturers in this issue need to consider not only their information collection costs, but also the impact on the brand, sales volume.

The third carrier can be searched in extreme cases, as I've described in my previous video, the carrier can't be accessed directly, but it can still be found by comparing the data. Overseas phone cards, except for those that only support Wi-Fi calling, are used domestically with the help of domestic carriers, and your information is just visible to the carriers to get the imsi for overseas calls.

The imsi tells you which carrier is in that country, and the other piece of information is the serial number of the phone, which is the imei code. The imsi is also the serial number of the phone, which is the imei code. By imei you know if it's an iPhone 14 or a Samsung 23 cell phone.

This way you get the imei associated with the phone to use an overseas phone card, to the point where still no one can find you, if one day you want to change a domestic phone card to use it, at the time of booting up the phone, through the imei of this phone to achieve the association of overseas phone use people domestic phone card. Of course this is just in theory, I believe no one is fine to bother to check this.

I am still of the opinion that in this country, it is not the technology that protects us, but the "ordinary", like a grain of sand in the sand, no one wants to spend money on you.