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Anonymous users2024-02-07It should be composed of a circuit with CPU and flash memory, which can store and calculate, can store short messages, ** numbers, and calculate password keys.
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Anonymous users2024-02-06Mobile phones--- base stations --- mobile phones.
Usually, the SMS message has been sent, but the mobile phone sends the SMS, and I don't know whether the base station has been sent successfully.
The SMS sending report is the prompt given by the mobile phone to the user after the base station replies to the successful sending of the mobile phone.
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Anonymous users2024-02-05Mobile phone memory card.
When you put it in the mobile phone card slot, press it in, the card will be locked, and then press it again, the card can automatically pop up, which is very convenient, the mobile phone card slot realizes automatic locking and ejection of the card and ejection is actually a pure mechanical structure, relying on the spring and the slide of different depths to achieve automatic lock and ejection.
Let's take a look at the shape of the memory card first.
There is a gap on the mobile phone memory card (click here to open** view), which is to use this gap to get stuck, see the picture below
Mobile phone card slot structure.
The structure of the mobile phone card slot is mainly composed of a locking rod, a guide guide groove, a locking hook and a return spring. When the memory card is pressed in, the locking lever is used to pull the guide slot. The guide guide groove is used to guide the movement trajectory and position of the locking tie rod to realize the position control of the guide guide groove.
The locking hook is used to hook the memory card. The return spring is used to eject the memory card.
Second, the following is a detailed description of the principle of memory card locking.
When the memory card is installed, the locking lever walks along the blue road to the right end groove, and then hooks the guide guide groove to realize the lock of the memory card and locks the intermediate state.
Locks the final state.
When the memory card is ejected, the locking lever walks along the orange path to realize the separation of the lever from the guide guide groove, and finally returns to the initial position to realize the automatic ejection of the memory card, as shown in the figure below
3. How to walk along the specified trajectory by locking the tie rod?
Relying on the different depths of the guide groove, the locking lever walks according to the specified trajectory, the depth of the blue path is greater than the yellow path, when the card is locked, the locking lever walks along the blue path, and when the card is ejected, it walks along the yellow path. See below for the specific path depth
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Anonymous users2024-02-04There is a pointer that can only follow the path of this hungry sock, when pressed, then stay in the middle, and then return to the original position when pressed.
Figure 2 is a key step, when Figure 1 is in the middle position, this abrupt vertical move upward, stuck in the phone card slot.
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Anonymous users2024-02-03The principle of mobile phone SD card letter is the principle of slippery slotting, and the small organization is a big wisdom.
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Anonymous users2024-02-02The function of the mobile phone card is to bind the user's identity information and communication services together to provide users with mobile communication services. Each SIM card has a unique identification number called an International Mobile Subscriber Identity (IMSI). IMSI is a 15-digit number** that identifies the user's reputation and mobile network operator.
When a user inserts a SIM card, the phone reads the IMSI and sends it to the mobile network operator to verify the user's identity and authorize them to use the communication service.
The principle of the mobile phone card.
The principle of the mobile phone card.
What is a SIM card?
The principle of the mobile phone card is based on the chip and memory of the inner shield section of the SIM card. The chip in the SIM card contains a unique key called the Authentication Key (KI). Authentication keys are used to authenticate a user's identity and prevent unauthorized access.
When a user inserts a SIM card, the phone reads the ki and communicates it with the mobile network operator's network to verify the user's identity.
I am an employee of a mobile company, like you, the balance in the card does not exceed 100 yuan, you will not be refunded, and it will not be transferred to your new card, only you consume it yourself, unfortunately, overlord clause. >>>More
1: The SIM card is not detected, resulting in the SIM card not being recognized. >>>More
In fact, the reason for these problems is nothing more than software and hardware problems. The system of the mobile phone itself is bloated, poorly optimized, or there are bugs in the app, which may cause the software to lag when running. >>>More
Mobile phone communication is to send and receive signals through the network base station, and then communicate with the called party, such as the mobile phone shows no service may be related to the following conditions: >>>More
How to deal with mobile phone stuck: 1. One-click acceleration to clean up the background software; 2. Clean up the memory of the mobile phone: (1) Enter the mobile phone i butler - mobile phone acceleration space management to clean the cache file; (2) Go to your phone settings -- more settings -- app management -- find the programs you often use (such as QQ, WeChat, etc.) -- store -- clear cache and data, and restart your phone. >>>More