Installation of a new SIM-A microSD card or memory card is one of the primary challenges faced by the owner of any new smartphone, including the popular Xiaomi Redmi 9. Despite the seemingly simple procedure, many users face difficulties due to the unusual design of the tray or the lack of a special tool in the package.
In this article, we will discuss in detail all the nuances regarding how to open for SIM in Xiaomi Redmi 9 and its modifications. We will look at the differences between versions 9A, 9C, 9T and 9S, since the location and type of slots may vary slightly depending on the regional version of the device, this will help to avoid common errors and maintain the warranty on the device.
Before you start physically impacting your device, you need to make sure that your smartphone is off or at least the screen is locked to avoid accidental taps. While current technology allows you to make a hot replacement, Redmi 9 recommends a full system shutdown to correctly recognize the new carrier.
Tools and workplace preparation
The first step in the process of installing the card is to find the right tool to retrieve the tray. In the ideal scenario, you use a special metal clip (ejector) that comes in the box with your phone. However, if the original tool is lost, you can use a regular stationery clip by straightening one of the ends of it.
Critically, it is not necessary to use sharp objects such as needles for sewing, pins or knives.The needle point can slip and damage the finger or scratch the frame of the smartphone, as well as punch the locking mechanism of the tray deeper than permissible.The hole diameter in the Xiaomi Redmi 9 is designed for a standard ejector with a diameter of about 1 mm.
⚠️ Warning: Never use excessive force when pressing the extraction mechanism.If the tray does not leave with a light press, you may have misidentified the hole or used a blunt object.
Prepare a clean, flat surface with good lighting. This is necessary, as the tray is for the purpose of the construction. SIM-The card is very small and easy to drop or lose, especially if you are working on carpet or dark fabric.Also make sure your hands are dry to avoid getting moisture inside the device.
- 📌 Original ejector or high-quality metal clip.
- 💡 Good lighting for visual control of the process.
- 🧼 Dry hands and clean working surface.
- 📱 Switched off smartphone for data security.
Finding a tray extraction hole
In the model Xiaomi Redmi 9 tray for SIM-the card is located on the lower end of the device, near the port USB However, depending on the modification (Global, European, Indian version), the design can vary, in most cases it is a combined slot for two nano-SIM cards, or a hybrid slot for one. SIM one microSD.
If you look carefully at the bottom of the body, you'll see a small circular hole that's separate from the speakers, and that's where you put the tool. In some versions, like the Redmi 9A, the tray may be on the left side, but most of the time, Xiaomi engineers place it on the bottom to symmetry the design.
Don't confuse the hole for SIM-A noise-cancellation card, which is also a small hole, but has no mechanical mechanism inside. Trying to insert a paper clip into the microphone will cause it to be permanently damaged.
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If you are not sure which hole is the right one, shine a flashlight inside: in the tray hole you will see a plastic or metal tongue of the mechanism, and in the microphone - a deep void or mesh.
Step-by-step instructions for removing the tray
Once you've identified the right hole, take the tool (clip or ejector) perpendicular to the end of the smartphone. Put the tip in the hole all the way to the end. You should feel a slight click or resistance, which is replaced by the movement of the mechanism. This means that you have hit the lock.
Apply a moderate but steady force, pressing strictly perpendicular to the body. Don't bend the tool, don't try to tuck the tray at an angle. Once the tray works, the tray will extend a few millimeters, allowing it to be grabbed by your fingers.
☑️ Procedure for tray extraction
Carefully pull the tray out. Don't pull sharply so as not to damage the contacts. SIM-If the tray is stuck, try wiggling the tool slightly left-right without removing it to free the stale mechanism.
Slot configuration in different versions of Redmi 9
Understanding the tray type is critical to the proper installation of cards. Redmi 9 has different configurations. Hybrid slots allow you to choose between two options. SIM-card SIM-A triple slot (rare but found in some regions) allows you to use two microSD cards. SIM memory card at the same time.
The table below shows the main differences in slot configuration for the popular Redmi 9 series modifications.This will help you understand what to expect from your device.
| Model of the device | Type of tray | Max. SIM number. | Support for microSD support |
|---|---|---|---|
| Redmi 9 (Global) | Hybrid | 2 (Nano) | Yes (instead of the 2nd SIM) |
| Redmi 9A | Hybrid | 2 (Nano) | Yes (instead of the 2nd SIM) |
| Redmi 9C | Separate slot | 2 (Nano) | Yes (separately) |
| Redmi 9T | Triple (3-in-1) | 2 (Nano) | Yes (at the same time) |
Notice the shape of the cutout in the tray. Nano-SIM is characterized by a cut-off angle. MicroSD card is often installed on the back or in a special compartment if the tray is combined. In hybrid trays Redmi 9 second. SIM-The card and memory card occupy the same physical space, so you can choose only one option.
If you have a model with a separate microSD slot (like in Redmi). 9C), second SIM-In hybrid models, you have to decide which is more important: a second phone number or a memory extension.
Installation of SIM-card and memory card
Put the extracted tray on a flat surface. Notice the pictogram that's squeezed out on the tray metal, which indicates the correct orientation of the chip. SIM-The cards should look downwards, and the cut angle usually coincides with the shape of the tray.
Carefully place the nano-SIM card in the appropriate recess. It should lie tight and not stagger. If you install a microSD card, make sure it is also oriented correctly (contacts down). Don't make an effort, if the card doesn't come in, flip it over.
What to do if SIM-map?
Once you have the cards installed, take the tray by the edges, trying not to touch the golden contacts with your fingers, as fat pollution can oxidize over time and worsen the connection.
- 🔽 Contacts down: The golden part of the chip always looks towards the screen or down.
- 📐 Cut corner: Orient by the shape of the tray.
- 🚫 No effort: the card should lie freely in the slots.
Return of the tray and check of work
Put the tray back into the case only in the position in which it was removed. An inverted tray can damage the contacts inside the phone. Push it carefully until the characteristic click. The tray should equalize to the frame of the case and not protrude outwards.
Turn on your smartphone. After you load the operating system. MIUI At the top of the screen, signal level indicators for one or two should appear. SIM-If the network does not appear, check if the card is inserted correctly, or go to the settings.
To check, go to the Settings menu → SIM-You'll see the status of each card here, if the card isn't identified, try erasing the contacts with a stripe or soft cloth and repeat the installation procedure.
⚠️ If after installing the card, the phone says "No" SIM-cards" or "wrong SIM-"card" do not rush to carry the device for repair. Often the problem is solved by simply restarting or cleaning the contacts.
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Correct orientation of contacts and absence of dust in the slot are the main factors of successful registration of the phone in the operator’s network.
Frequent problems and their solution
One of the common problems is that the tray gets stuck, and this can happen if there's dust in the slot, or if the tray has been inserted curved, and you can't use tweezers or a knife to pull the tray out, and the best way to do that is to gently sway the device and try to push the ejector again.
The other problem is that the phone doesn't see the second one. SIM-Make sure that the second slot is activated in the settings. In some firmware, the second slot may be disabled software. → The phone. → All the parameters to see IMEI slot-slot.
If the tray is deformed, it can lead to a short circuit, in which case you need to order a new part. For the Redmi 9, it is an expendable material that is inexpensive and easy to change.
- 🔧 Stuck: Use an ejector, do not pick with a knife.
- 📶 No network: check the slot activation in the settings MIUI.
- 🔄 Oxidation: wipe the contacts with alcohol when replaced.