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Feb 21, 2026

What is IMEI code

IMEI code, namely the serial number of the mobile phone. It is the abbreviation of International Mobile Equipment Identity. Like the identity card of a mobile phone, it is used to help identify the identity of a mobile phone. Each mobile phone has only one serial number, which is not the same. We usually match the serial number displayed after pressing the "* # 06 #" key on the mobile phone with the barcode on the mobile phone box and the serial number in the back of the mobile phone after removing the electric board. If the three are the same, it is more likely to be genuine goods (not excluding second-hand goods).

Feb 20, 2026

What is the subnet mask

Subnet mask is also called network mask, address mask and subnet mask. It is used to indicate which bits of an IP address identify the subnet where the host is located and which bits identify the bit mask of the host. The subnet mask cannot exist alone. It must be used in combination with the IP address. The subnet mask has only one function, which is to divide an IP address into two parts: network address and host address. The subnet mask is the basic knowledge that everyone who uses the Internet must master. Only by mastering it can you truly understand the TCP/IP protocol settings. Let's explain what subnet mask is in simple terms.

Feb 19, 2026

What is a discrete graphics card

Discrete graphics card refers to a graphics card that exists as an independent board and needs to be inserted into the corresponding interface on the motherboard. Discrete graphics card has independent video memory, does not occupy system memory, and is technically ahead of integrated graphics card, which can provide better display effect and operating performance. Discrete graphics cards are divided into built-in discrete graphics cards and external graphics cards. As an important part of the computer host, the graphics card is very important for those who like to play games and engage in professional graphic design. At present, the suppliers of graphics chips for civilian graphics cards mainly include AMD (formerly ATI) and nVIDIA.

Feb 18, 2026

icloud space is always insufficient to do

iCloud as a cloud service provided by Apple, users can get 5GB of cloud space for free, if more than 5GB of space we need to buy space, then there is no other way to solve it?

Feb 17, 2026

The difference between SLR and digital cameras

SLR digital cameras and we are more in contact with the ordinary consumer digital cameras are two completely different systems, the difference here is mainly reflected in the internal structure of the two.

Feb 16, 2026

What are "Other" and "Other System Data" on iPhone and how do I clean them up?

After using iPhone for a long time, you will find that more and more storage space is taken up, especially for the "Other" item, which tends to take up more and more space.

Feb 15, 2026

A one-minute walk through the difference between a switch and a router

Switch, meaning "switch", is a network device used for electrical (optical) signal forwarding.

Feb 14, 2026

What are vr virtual glasses? How is the effect?

3D stereo glasses is a penetrating LCD lens, through the circuit to the LCD glasses on, off the control, on can control the glasses lens all black, in order to cover a glance image; off can control the glasses lens for transparent, so that the other glance to see another glance should see the image.

Feb 13, 2026

Cell phone "a daily charge" and "no power to recharge", which is more harmful to the battery?

Cell phone battery is an important part of the phone, and its life and capacity directly affect the experience of using the phone. So, how should we charge the phone properly?