Modern smartphones like the Xiaomi Redmi 8T are equipped with hybrid slots that require careful attention when installing communication modules. Users often face difficulties when first familiarizing themselves with the design of the tray, especially if they have previously used devices with removable batteries. Incorrectly installing the chip can lead to damage to contacts or lack of network signal, making the procedure critical to starting the operation of the gadget.
In this guide, we will discuss in detail the process of extracting the tray, the correct orientation. SIM-maps and microSD drives, and consider possible network-definition issues.Redmi Hybrid Slot 8T You can use either two SIM cards, or one SIM card and a memory card, but not all four elements at the same time. Following the exact instructions will help avoid mechanical damage and ensure that your device runs smoothly on networks. 4G.
Preparation of the workplace and necessary tools
Before any electronic manipulation begins, it is necessary to ensure safe working conditions. The main tool for removing the tray is a special metal clip that comes with a smartphone box. If the original key is lost, you can use a thin paper clip, but you should be careful not to scratch the case or break the tool inside the hole.
It is recommended to perform the procedure on a table with good lighting, covered with soft cloth or towel.This will prevent the slipping of small parts and protect the smartphone screen from accidental scratches in the event of a fall.It is also important that your hands are dry and clean, as fat or moisture can get on the contacts of the chip and cause oxidation.
- 📱 Smartphone Xiaomi Redmi 8T off-screen.
- 🔑 Key clip or thin needle to remove tray.
- 💳 Active. SIM-Nano-SIM card from your operator.
- 🧹 Dry soft fabric to wipe contacts if necessary.
Make sure you use the Nano-SIM format, as it is the smallest standard to date. Mini or Micro format cards won't fit physically and can get stuck in the slot if you try to insert them by force. If your SIM card is combined in size with break-out parts, carefully remove the excess frames along the fault lines.
Location of the tray and the extraction mechanism
In the Redmi 8T model, the SIM card tray is located on the lower end of the device, to the left of the USB Type-C charging connector. The design is made in the form of a narrow elongated frame that fits tightly to the body to ensure tightness and protect against dust.
Insert the tip of the paper clip into the hole strictly perpendicular to the body. You don't have to tilt the tool to the sides, because this can damage the internal mechanism of the pusher. You have to put a confident, but not excessive force: you have to feel a slight click and a springy effect, after which the tray will move out a few millimeters.
⚠️ Warning: Never use ballpoint pens, toothpicks or other items that may break inside the hole to retrieve the tray.
Once the frame is partially out of the body, gently pull it with your fingers over the edge. The movement should be smooth, without jerking. If the tray is not easily removed, check if you hit the hole correctly, and try to push a little harder, but do not apply brute force that can deform the metal.
Orientation SIM-mapping and traying
The extracted tray is shaped to fit the size of the Nano-SIM chip. On one side of the frame, there is a sloping angle that completely replicates the geometry of the SIM card itself, so that the user cannot physically insert the chip on the wrong side, but inattention often leads to errors.
Put the SIM card on the tray so that the golden contacts are directed downwards, to the inside of the frame, if you look at the front of the tray. The bevelled corner of the card should coincide with the bevelled angle of the cutout in metal. The Redmi 8T uses a combined slot: one compartment is designed for the first SIM card, the second compartment can accept either a second SIM card or a microSD memory card.
If you plan to use two SIM cards, place them in the appropriate recesses. Pay attention to the marking on the tray itself: it often shows schematically which angle should be on top and which from below. Make sure that the card lies flat and does not protrude beyond the edges of the metal frame, otherwise it can be hushed when inserted.
- 🔽 The gold pins of the chip should look down (inside the tray).
- 📐 The beveled corner of the card strictly coincides with the shape of the cutout.
- 🚫 The card should not be staggered or protruding beyond the limits.
- 💾 The same principle of contact orientation is used for the memory card.
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Before installing, wipe the golden contacts of the SIM card with a dry eraser or soft cloth - this will improve contact and help if the phone has not seen the network for a long time.
Inserting the tray back into the smartphone
Once the chip is framed successfully, you need to get the tray back into the device body, which is the most critical thing to do, and you need to be careful, so you can take the smartphone so that the bottom end is pointed towards you and the screen is looking up or down, so you can control the angle of entry.
Put the tray into the slot smoothly, making sure it enters smoothly, without skewing. If you feel resistance, do not push: most likely, the tray is turned over or skewed. A properly installed frame enters the body easily, with little or no effort, it will not equal the body.
| Condition of tray | Feelings when inserted | Action. |
|---|---|---|
| Right orientation. | Easy entry, smooth slip. | Continue to insert until clicked |
| Inverted tray | Stress at the entrance, it is impossible to insert | Remove and flip |
| Side-skewed | Friction against the wall, getting stuck. | Align and try again |
| Foreign subject matter | Hard accent, crunch. | Stop and check the slot immediately. |
The final step is to completely drown the tray into the case. It has to align with the frame of the smartphone without forming steps. If the tray is left sticking out, it can disrupt the moisture protection (if claimed) and lead to dust entering the device. In the Xiaomi Redmi 8T, the fixation mechanism is reliable, and the properly inserted tray is held tight.
☑️ Checking the installation of the SIM card
Initial network setup and activation
After you physically install the SIM card, you need to turn on your smartphone. The MIUI system that runs Redmi 8T will automatically detect the new communication module. The screen will display a welcome window suggesting you configure the SIM card if you are doing it for the first time, or simply display network icons at the top of the screen.
If you use two SIM cards, the system will prompt you to assign their roles: which will be used for mobile data and which for voice calls by default. → SIM-Maps and mobile networks. It's important to make sure that the power slider for each card is activated.
In some cases, especially when using older SIM cards, you may need to enter PIN-This is a security mechanism that's requested every time you reboot the device. PIN-previous code, try standard combinations 0000 or 1234, or refer to the contract from the carrier.
⚠️ Note: Three times incorrectly entered PIN-The code will block the SIM card. PUK-code that is on the plastic card-holder received when buying a SIM card from the operator.
Make sure that the signal level indicators and network type appear in the status bar (4G/LTE). If there are no icons, check if activated. SIM-The card is from the operator, especially if it is new.
Diagnostics of problems with the definition of the SIM card
There are times when the phone says, "No SIM card" or "False SIM card." The first step is always to reboot the device, which allows the system to re-interrogate the communication module and read the data from the chip, often a simple restart solves the problem of software failures.
If the reboot didn't work, remove the tray and inspect the contacts carefully. They should be free of contamination, oxides or mechanical damage. Wipe the SIM card contacts with soft dry cloth. Also try to install the SIM card in another slot if there are two to rule out a malfunction of a particular connector.
What to do if the SIM card is cropped incorrectly?
Check the network settings in the Settings menu → SIM-maps and mobile networks → Network type: Make sure the value "Preferred" is selected 4G (LTE)". If selected, "Only" 2G" or"3G", The phone may not see the network in areas where the new generation of coverage dominates and the old one is no longer there.
- 🔄 Perform a smartphone reboot to reset network settings.
- 🧹 Clean the contacts of the SIM card and tray from dust.
- 📡 Check the settings of the preferred network type.
- 📞 Call the operator to check the activation status of the number.
Using a memory card instead of a second SIM card
Because Redmi 8T is hybrid slot, you can sacrifice a second SIM card to expand the internal memory, so you can install a microSD card instead of an operator chip in the second tray, and the installation process is identical to the SIM card installation, so you can keep the contacts in line.
Once the memory card is installed, the system will suggest formatting the drive. Choose "Use as a portable storage" if you plan to transfer the card to other devices, or "Use as internal storage" if you want to install applications on it (although this may slow them down).
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A hybrid slot is a compromise: you can have two SIM cards or one SIM card with a lot of memory, but not all at once.
When using a memory card, it is important to keep in mind the speed of the memory card. To record high-resolution video or run heavy applications, it is recommended to use cards of the speed class UHS-I or higher. Slow cards can cause delays in the operation of the camera or interface when accessing files.