Many users are faced with the need to replace SIM-cards when you buy a new fare, change carrier or move to another country.In the case of Xiaomi Redmi 9T This process seems simple, but it has its own technical nuances, ignoring which can damage the tray or the device itself.
Mishandling the extraction mechanism is a common reason to go to service centers. To avoid a mechanical switch breaking or a contact strain, you need to follow a clear algorithm of actions. In this article, we will discuss in detail where the clip hole is, how to place the cards correctly, and what to do if the tray does not respond.
Before you start physically affecting your smartphone, make sure you are in a well-lit place, allowing you to see fine details and avoid damaging fragile components.
Location of the tray and preparation of tools
The first step is to find a slot for SIM-In the Redmi model. 9T, Like most modern Xiaomi smartphones, the tray is on the bottom end of the device. If you hold the phone with the screen to yourself, the hole will be located on the left, next to the charging port. USB Type-C and speaker.
To retrieve the tray, you need a special key that comes with the phone, which is a thin metal needle. If the original tool is lost, you can use a paper clip, straightening one of its ends to a straight line, and the main requirement is that the diameter of the tool must be sufficient not to bend it when pressed.
It is strongly advised not to use needles for sewing, toothpicking or other sharp objects. Needles can break inside the hole, and the toothpicking tree will crumble and block the mechanism. Use only a metal tool with a blunt end.
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If you use a paper clip, make sure that its end does not have barbs that can scratch the case or get stuck in the mechanism.
Step-by-step extraction instruction SIM-map
The extraction process requires precision and the right angle of inclination of the tool. Put the tip of a paper clip or key into a round hole at the end of the tray. Press perpendicular to the body of the smartphone, applying a moderate effort. You should feel a slight click and see the tray extend a few millimeters.
Once the mechanism is in place, gently pull the tray with your fingers until it is fully removed. Don't pull sharply to avoid damaging the contacts. On the surface of the tray, you'll see notches for Nano-SIM cards and possibly microSD cards.
Pay attention to the shape of the notches: they have a bevel on one side, which corresponds to the shape of the very SIM-This prevents the wrong installation if you're careful, put the card in the tray, keeping the contacts in alignment.
☑️ Procedure for replacement
Features of the combined slot in Redmi 9T
It is important to understand the architecture of the slot in Xiaomi Redmi 9T. This is a hybrid tray, which means that you can install either two or more of them. SIM-card SIM-card and one microSD card. You can't use two SIMs and a flash drive at the same time.
The tray is divided into two parts, the first part is designed for the main part. SIM-The second one is either for the second SIM or the memory card, and if you're planning to expand the memory of the device, you're going to have to sacrifice the second SIM card, which is the standard solution for the budget segment, allowing you to save a thin case.
When installing a memory card, make sure it is securely locked in your cell. Poor fit can lead to read errors or loss of files. Card contacts should be directed down to the main board of the smartphone.
Can I use a microSD SIM adapter?
What to do if the tray is stuck or not removed
Sometimes users are faced with a situation where the tray does not extend even when pressed hard, this can be caused by dirt, deformation of the tray or sticking of the mechanism. First of all, try to inspect the hole in bright light for pile or dust.
If there's no visual obstacle, try to change the angle of the tool, push it slightly harder, but not fanatically, and at the same time sway the paperclip slightly up and down, which can help to free up the stale lever, and you can also try to put a piece of tape on the end of the tray, wait for the glue to dry out and pull sharply, but this method is risky.
⚠️ Attention: If the tray is not removed, do not use excessive force. You can break the internal mechanism or damage the motherboard.
There's a method that uses superglue, but it's extremely dangerous for inexperienced users, where a drop of glue on a paper clip is glued to the tray, and then extracted, and the risk is that the glue can leak into the phone and permanently damage the connector.
Comparison of formats SIM-maps and compatibility
To work properly, the device must use the right sized cards. Modern smartphones, including the Redmi 9T, work exclusively with the Nano-SIM format.
If your SIM card is larger (Micro-SIM or standard SIM), it must be replaced by a carrier or carefully trimmed along the circuit using a special stencil. However, cropped cards can have uneven edges, which will make it difficult to retrieve them in the future.
The following is a table showing the differences in formats and their applicability:
| Map format | Dimensions (mm) | Compatible with Redmi 9T | Note |
|---|---|---|---|
| Standard SIM | 25 x 15 | No. | Outdated format |
| Micro SIM | 15 x 12 | No. | Requires replacement or pruning |
| Nano SIM | 12.3 x 8.8 | Yes. | Main format |
| eSIM | Virtual | No. | Not supported by the model |
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Xiaomi Redmi 9T supports only the physical format Nano-SIM. the use of cards of other sizes is impossible without mechanical modification.
Frequent errors and precautions
Replacement SIM-Users often make mistakes that lead to breakdowns, one of the most common is placing the card upside down or inverted. Although the design of the tray involves protection from the fool, with a certain effort, you can insert the card incorrectly, which will lead to the closure of the contacts.
Another mistake is to set the card off without rebooting. While current Android systems support hot replacement, it is better to reboot the device after installation to correctly identify a new network operator and update the APN settings.
- 📱 Never put foreign objects in the tray when trying to clean it.
- 🔧 Do not use rusted or oxidized tools to avoid oxidizing the contacts.
- 🔋 Before removing the tray, it is advisable to turn off the smartphone, although this is not always necessary for data security.
Remember that the warranty on the smartphone can be canceled if traces of mechanical damage to the case or connectors are found, caused by sloppy treatment of the user.
Network settings after replacement SIM-map
After the physical installation of the new SIM-card and phone switching on, the system may not automatically configure the Internet. APN. They usually come in SMS from the operator, but sometimes they need to be written manually.
To do this, go to the Settings menu. → SIM-Maps and mobile networks. Select the SIM card you want and find the hotspot (APN). If the internet doesn’t work, create a new hotspot by entering data relevant to your operator.
In some cases, input is required. PIN-If you don't know your code. PIN, Don't try to guess it many times. Three wrong inputs will block the card, and you'll need to unlock it. PUK-code that can be found on a plastic card holder issued when buying a SIM card.
Diagnostics of definition problems SIM-map
It happens that after installation the phone writes "SIM-No card found" or "No service." First wipe the SIM contacts with a soft stain or dry cloth.
Check if the card is sitting tight in the tray. It should not hang around. If the tray is deformed, the card may not reach the contacts inside the phone, in which case you can try to bend the tray carefully or put a thin layer of paper (without closing the contacts), but this is a temporary solution.
⚠️ Warning: If the phone doesn't see the SIM card after all the manipulations, check it on another device.
It's also worth checking if the SIM card itself is activated, new cards require activation through a call to the operator or through a special application, and without activation, the network will not be available.
Slot care and durability
To keep the retrieval mechanism running for a long time, try not to change the SIM card too often. The constant movement of the tray wears out the spring mechanism and contacts. If you often need to change cards, use adapters or carry a second phone.
Protect the bottom of the smartphone from dust and moisture. Although the Redmi 9T has splash protection, the open SIM card slot is a vulnerability.Use protective films or cases with elevated sides.
Check the tray regularly, and if you notice a oxidation plaque (greenish or dark), clean it carefully with a cotton swab dipped in alcohol, which will help avoid signal problems in the future.