⚠️ Note: Before any manipulations SIM-Make sure the smartphone is completely off or disconnected from the charger to avoid accidental short circuit of contacts.
Modern smartphones like the Xiaomi Redmi 9T have switched to nano-SIM cards, which are significantly smaller than their predecessors. This form factor allows engineers to save precious interior space for housing a larger battery or improved communication modules. However, for inexperienced users, the miniature size of the chip and tray can be a source of concern when first replaced.
Owners often have to change the operator or add a second SIM card to separate personal and work contacts. Proper installation of the communication module ensures stable reception of the signal and no errors in the definition of the network. Incorrect installation can lead to the fact that the phone will not see the network at all or will work intermittently.
In this article, we will discuss in detail the process of extracting the tray, preparing the memory card and correctly installing it in Redmi 9T slots. You will learn about the nuances of the hybrid slot design and understand how to safely make a replacement without damaging the contacts or the device body.
Preparation for installation SIM-map
Before you pick up a paper clip or key for extraction, you need to prepare the workplace and the very thing. SIM-Nano-SIM is the smallest of the common formats, so you need to work with it carefully so you don't lose or damage the chip. Make sure your hands are dry and clean and the lighting in the room is bright enough.
It is also important to check the status of the card itself. If you are using an old SIM that has been cut out of micro-SIM or standard size, make sure that the edges are flat and have no barbs. Xiaomi Redmi 9T has a readout mechanism, and any irregularities can get stuck inside the case. It is best to get a new card from the carrier if your current one looks worn out.
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If SIM-The card is non-standard size or hand-carved, before installation be sure to wipe it with a soft dry cloth to remove dust and static electricity.
You only need one tool to work with, the extraction key that comes with your smartphone. If the original tool is lost, it can be replaced with a thin paper clip or needle. The main requirement for the tool is that it must be thin enough to enter the hole, but strong enough to withstand pressure.
Location of the tray and search for the hole
Finding a tray extraction hole is the first physical step that can baffle a beginner. In the Redmi 9T, engineers have placed a slot on the bottom end of the device, next to a USB Type-C charging connector. This is the standard location for most modern Xiaomi smartphones, allowing you to conveniently retrieve the card even when using a case.
Look closely at the bottom of the smartphone, and you'll see a small circular hole that's separate from the speakers and the charging port, and that's where you put the key, and there may be a small marking next to the hole that indicates that there's a second slot or slot for the memory card.
Don't confuse the hole for SIM-A noise-cancellation card with a microphone that is also on the bottom or top end. The microphone looks like a very small dot without a metal edging, whereas a tray hole usually has a metal edging and a little deeper. If you're in doubt, compare the diameter: a hole for the tray. SIM always more.
The tray extraction process
The process of extracting the tray requires precision, but does not require excessive force.The spring mechanism in the Xiaomi Redmi 9T is designed for a certain force, and if the tray does not come out, then you either did not hit the hole or use a too blunt tool.
- 📱 Take the smartphone in one hand, holding it tightly, but not squeezing the side edges strongly.
- 🔑 Insert the sharp end of the key or straightened clip into the hole perpendicular to the body.
- 💥 Press sharply and confidently until a characteristic click, after which the tray will pop out.
- 👐 Carefully remove the tray with your fingers, trying not to touch the golden contacts on it.
After extraction, carefully inspect the tray. at Redmi 9T It's a combined slot. On one side, there's a place for the first one. SIM-The other is the place for the second. SIM, The design of the tray may vary depending on the region of delivery, but the principle remains the same.
⚠️ Warning: Never try to remove the tray unless it pops out after pressing. Repeat the attempt, making sure the tool is inserted evenly, otherwise you may damage the internal mechanism or scratch the body.
Orientation and installation SIM-map
The most important thing is to get the card in the tray right, and the golden contacts on the map should look down to the contacts inside the phone, and if you mix the sides, the phone won't see the SIM, and in the worst case, you can damage the reader.
On the Xiaomi Redmi tray 9T There is usually a small cutout in the corner that corresponds to the shape of the corner. SIM-This cutout will prevent you from putting the map upside down if you're careful. The map should lie in the recess tightly, without wobbling or protruding beyond the edge of the tray.
☑️ Proper installation SIM
Insert the map into the appropriate slot. If you use two SIM cards, make sure they are both installed in their bays. In some versions of the firmware, when you turn on, the phone will determine which card is the main one for data and which one for calls, but physically they need to be placed correctly.
Use of a memory card slot
The Redmi 9T supports the expansion of internal memory with microSD cards, which is a great way to store photos, videos and music without having to delete old files, but there is an important design nuance that you need to know about.
The slot is hybrid, which means that the second slot can work with either the second slot. SIM-You can either use a card or a memory card, but not simultaneously with both formats, unless you use special adapters (which are not recommended.
| Configuration | Slot 1 | Slot 2 | Support |
|---|---|---|---|
| Two. SIM-map | Nano-SIM | Nano-SIM | Complete. |
| SIM + Memory Card | Nano-SIM | MicroSD (up to 512 GB) | Complete. |
| Only a memory card. | Empty. | MicroSD | Possible. |
When installing a microSD card, it is also important to keep the contacts in the direction downwards. The card should enter the groove with a slight effort. Don't be afraid to press a little harder to lock it, but avoid sudden movements. Once you install the second SIM or flash drive, the tray is inserted back into the phone.
What to do if your phone doesn’t see your memory card?
Inserting the tray back into the smartphone
The final step is to get the tray back in place. It's important not to confuse the sides of the tray. In the Xiaomi Redmi 9T, as in most phones, the tray has a specific shape that allows you to insert it with only one side. If you feel resistance, do not push.
Turn the tray 180 degrees and try to insert again. The right side comes in smoothly and all the way to the end. You have to feel the tray level with the frame of the case. If the tray sticks out even a millimeter, it is not fully inserted, which can lead to dust and moisture entering the inside.
⚠️ Warning: Make sure that the rubber seal (if any on your version of the device) is not bent and protrudes outward, otherwise the tightness of the housing will be broken.
Once installed successfully, you can turn on your smartphone. MIUI automatically detect new SIM-If you inserted two SIMs, the phone will suggest you set them up: assign one for the mobile Internet and the other for the default voice calls.
Network settings after installation
After the device is turned on and input PIN-If you have a code, if you have one, look at the communication indicators in the upper right corner of the screen, and you should see the operator's name and signal level icons, if you have the operator's name instead of "No network" or "Put in" SIM", This means that the card is installed incorrectly or damaged.
To set up two SIM cards go to the Settings menu → SIM-So you can flexibly manage priorities, for example, you can set up a scenario where you always make calls from the first SIM, and you spend the Internet from the second, where the tariff is more profitable.
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Proper setting of SIM-card priorities in the MIUI menu allows you to save money on mobile communication, using tariffs of different operators as efficiently as possible.
In the same menu, switching between network modes is available: 5G, 4G, 3G. For Redmi 9T, the optimal mode is automatic selection, but in areas of uncertain reception, it is sometimes useful to manually switch to 3G or 2G to save battery power and voice stability.