Installing a communication module is the primary and most important step in setting up any new gadget. Owners of the Redmi Note 8 model often face the nuances of placing memory cards and SIM cards due to the specific design of the tray. Installation incorrectly can lead to the fact that the device will not see the network or can not read data from the drive.
In this article, we will take a closer look at the installation process, focusing on contact orientation and sharing two SIM cards with a memory card, and learn how to avoid mechanical damage and what to do if the phone stops seeing the network after the module is replaced.
Preparation of the workplace and tools
Before you start to physically affect the body of the device, you need to prepare a clean and well-lit space, dust and small debris can get into the case through the tray, which in the long run can cause oxidation of contacts or sticking buttons. The ideal option is to use a dry surface of the table without pile.
To remove the tray, you'll need a special metal clip that comes with the device. If the original tool is lost, you can use a thin needle or pin, but you need to act with utmost care. The sharp angle of the needle can scratch the body or damage the lock mechanism if you press too hard.
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Use a paper clip from the kit: it has an optimal thickness and a rounded tip, which minimizes the risk of damage to the tray extraction mechanism.
Make sure your hands are dry and clean. Fat stains on your fingers can make it harder for the metal pads on the SIM card itself to come in with the pins on your phone. If you've just come out of the street or been doing physical work, you'd better wash your hands with soap and wipe them thoroughly with a towel.
Tray design and orientation SIM-map
The tray in the Xiaomi Redmi Note 8 has a combined design that often causes confusion among users.It supports the installation of two nano-SIM cards, but one of the slots is hybrid.This means that you have to choose between using two SIM cards, or one SIM card and a microSD memory card.
Visually, the tray is divided into two parts: one is designed exclusively for nano-SIM, and the second is hybrid. It is important to understand the geometry of the cutouts: the SIM card has a cut angle that should exactly match the shape of the depression in the tray. Wrong orientation will not allow the map to fit tightly to the contacts.
⚠️ Warning: Never force a SIM card into a tray, if it doesn't come in easily, it means you've misdirected or are using an inappropriately sized card (e.g., micro-SIM instead of nano-SIM).
For clarity, consider the differences in the configuration of slots. Below is a table describing the capabilities of each installation option:
| Configuration | Slot 1 (External) | Slot 2 (Inner/Hybrid) | The result |
|---|---|---|---|
| Option A | Nano-SIM | Nano-SIM | 2 SIM cards are available, MicroSD is not supported |
| Option B | Nano-SIM | MicroSD | 1 SIM card and memory card work |
| Option B | MicroSD | Nano-SIM | Incorrect performance (SD in slot 1 is often not read) |
| Option G | Nano-SIM | Empty. | 1 SIM card works in single board mode |
Step-by-step installation instructions
The installation process requires care, but it's technically quite simple. First, find a small hole on the bottom end of the device next to the USB Type-C connector. Insert the extraction tool into the hole perpendicular to the case and press before you click. The tray will extend a few millimeters, after which it can be pulled out with your fingers.
Place the tray on the table with the outside up. Make sure the contacts on the SIM card itself (the golden part) are pointing down to the tray contacts. If you install one card, place it in an external slot (usually closer to the edge of the tray). If you use two cards, the second is set to the inner slot on the back of the contacts.
☑️ Checklist of correct installation
After you place the cards, carefully insert the tray back into the case. Make sure you don't confuse the top and bottom of the tray -- it has a certain geometry and won't come in until the end if you flip it over. Don't use excessive force: if the tray resists, pull it out, flip it over and try again. When the tray equals the body, slightly press it until you hear the characteristic click of the lock.
Network settings after installation
After the physical installation of the communication modules, you need to turn on the device. Modern Xiaomi smartphones with a MIUI shell automatically detect the presence of a new SIM card when you first download, and a notification will appear on the screen about the detection of a new carrier.
The system will suggest you adjust the network settings"OK" or "Apply." If the SIM card is secure. PIN-Enter the code provided by the operator (standard values are often 0000 or 1234, but it is better to clarify this in the contract or on the operator's website).
What to do if the phone requires PUK-code?
In some cases, especially when using older SIM cards, it may be necessary to manually configure access points. APN It's a mobile Internet service. Usually, these settings come automatically in the form of a mobile Internet. SMS, But if the Internet does not work, the path to settings is as follows: → SIM-maps and mobile networks → Select a SIM card. → Access points (APN).
Expanding Memory with MicroSD
Using a hybrid memory card slot is a popular scenario for the Redmi Note 8, which has a modest amount of built-in storage in the basic versions.The MicroSD card allows you to store photos, videos and music, freeing up the main system memory for applications.
When installing a memory card, it is important to choose a quality drive. Cheap cards of unknown brands can work slowly, causing interface lags when opening a gallery or running heavy games from a phone. It is recommended to use Class 10 or U3 speed cards from trusted manufacturers.
Once the card is installed, the system will suggest formatting it. You can choose to use it as a portable storage (files are visible on other devices) or as part of internal memory (files are encrypted and not visible on a PC without unlocking your phone).
⚠️ Note: Formatting a memory card completely removes all data from it. If the card already has important files, copy them to your computer before installing them on your phone.
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A hybrid slot is a compromise: you get either dual SIM or memory, but not both options at the same time.
Diagnostics and troubleshooting
Sometimes, after you put a SIM card in the status bar, you get a crossed-out SIM card icon or a sign that says, "No net." First of all, check if the tray is tight. If it protrudes even a fraction of a millimeter, the contact may be broken. Remove the tray, wipe the contacts with dry soft cloth and insert again.
If the problem persists, check the settings in the menu. Go to Settings → SIM-maps and mobile networks and make sure the switch opposite the SIM card is activated, it is also worth checking if the "In the plane" mode is on, which blocks all wireless modules.
In rare cases, you may need to reset your network settings. This will not delete your personal data (photos, contacts), but will return to factory values the parameters of Wi-Fi, Bluetooth and mobile networks. You can do this through the Settings menu → About phone → Reset settings → Reset your Wi-Fi, mobile Internet and Bluetooth settings.