Friends who often browse the Douyin and Kuaishou apps will see some advertisements selling data cards, such as 19 yuan for 206g telecom card and 29 yuan for 500g data card. It clearly states that there is no speed limit, no limit, and nationwide Free shipping, is this true? Can I buy it? Next we analyze and analyze.
Through the introduction, we can see that this kind of card can only be used to surf the Internet, not to make phone calls or text messages. To put it bluntly, this kind of card is a pure data card, also called an Internet of Things card.
Do you know about IoT cards?
The IoT card is provided by the three major operators for IoT service companies to connect smart terminal devices. It is only sold in batches to corporate users and is currently widely used in:
Electricity: power meter reading, power equipment monitoring, etc.; Transportation: vehicle pre-installation, logistics transportation, vehicle after-installation, etc.;
Finance: wireless POS terminal, tax control invoice printer, etc.;
< p>Other industries: smart home, enterprise security, medical care, agriculture, energy, meteorology, hydrological monitoring, oil fields, meteorology, environmental protection and other fields.Different from ordinary mobile phone cards, IoT cards are not intended for individual users, that is, they cannot be used on devices other than mobile phones and tablets.
#流#Telecom’s 29 yuan unlimited data card and China Telecom’s 29 yuan 500g data card are real?
At present, the cards with signs such as "large data card", "0 monthly rent" and "no voice call function" that appear on Douyin, Kuaishou and Toutiao are basically this kind.
This kind of traffic used on mobile phones uses a "traffic pool", that is, after the company goes to the operator to wholesale IoT cards, it then uses technical means to make these batches of cards *** If you enjoy this traffic, then the traffic he claims is 500G. If this card is shared by many people, the traffic you may end up using is far lower than the traffic he promised.
In addition, if the IoT card is detected when being used on a mobile phone, it will be stopped. The main method of detection is to lock the card slot. If the IoT card is detected when changing the card slot, the card will be locked. For example, when changing a mobile phone, there is no way to unlock this kind of card lock, you can only change the card.
As a card for industry applications, the IoT card itself has very powerful background monitoring and management capabilities. It is a very good function for the IoT industry application itself, but Insert this card into our personal mobile phones, and it is very likely that your personal information will be exposed to the surveillance of criminals at any time.