How to put it SIM-Map in Xiaomi Redmi 9: instructions with photos and nuances

Xiaomi Redmi 9 remains a popular choice due to its price and functionality balance, but even experienced users sometimes have questions about basic operations. SIM-However, a bad experience with other models (where the tray is removed differently) or the fear of damaging the device often leads owners to look for detailed instructions.

In this article, we will not only explore the standard nano-SIM installation procedure in Redmi 9, but also nuances that are rarely mentioned in official manuals. SIM-MicroSD cards, what to do if the tray is jammed, and why the phone may not see the network after installation, and you will find answers to common questions, from the differences between slots to tips on choosing an operator for a second setup. SIM.

If you’ve just unpacked the new Redmi 9 or are planning to change carriers, bookmark this instruction, and it’s useful for those who have a problem with “no net” after reshuffling cards.

Preparation: What will be needed for installation SIM-map

Before you start installing, make sure you have everything you need. Xiaomi Redmi 9 (model M2003J15SC or similar modifications) will require:

• 📱 Nano-SIM (or two if you plan to use Dual) SIM). Note: Redmi 9 only supports nano format – if you have a different size card, you will have to cut it or replace it in the cabin of the operator.
• 🔧 A paper clip or a special key to extract the tray, and it comes with a metal key, but you can use an unbended clip.
• 📦 MicroSD card (optional). If you want to expand your memory, note that the slot SIM 2 is combined with a microSD slot - you will have to choose between the second SIM and additional storage.
• 🧹 Soft cloth or napkin. Useful to wipe the tray and contacts. SIM-Dust or fat cards that may impair communication.

Important: If you're switching from another phone, don't rush to retrieve the old SIM. First, check if it's active (like calling from another device). Some carriers lock the card when you change devices frequently, and you'll have to call for support to unlock.

⚠️ Note: Do not use sharp objects (needles, knives) instead of a paper clip - they can damage the locking mechanism of the tray. If the key is lost, buy a replacement at the Xiaomi service center or order on AliExpress (search on request "SIM tray ejector pin").

Where is the slot for SIM-maps in Redmi 9

Xiaomi Redmi 9 tray for the first time SIM-The map is located on the left end of the body (if you look at the screen), it is easy to recognize by the small hole for the paper clip and the characteristic outline. 9A or Redmi 9C) The slot can be on the right - specify this in the documentation for your model.

To avoid confusion, remember a simple rule: the slot is always on the same side as the volume buttons. The photo below shows the exact location (clickable to zoom in):

If you can't find the slot, you may have a case on your phone that covers it. Take off the case and look around the case again. Also make sure you don't confuse the slot for the slot. SIM plug-in IR-port (infrared transmitter) that is available in some versions of Redmi 9.

Redmi 9 uses a hybrid slot: you can install either two nano-SIMs or one SIM+microSD. You can’t use two SIMs and a memory card at the same time.

Step-by-step instruction: how to insert SIM-map

Now, let's get to the process. Follow the instructions Step-by-step to avoid mistakes.

1. Turn off your phone. Although many people install SIMs on the device on, we recommend turning off Redmi 9 to avoid disruptions to the communication module. To do this, press the power button and select Turn off.
2. Find a hole to remove the tray. As we wrote earlier, it's on the left end. Take a paper clip or a key and gently insert it into the hole all the way through.
3. Remove the tray. Press the paperclip with a little effort - the tray should "jump" out of the case by 1-2 mm. Then pull it with your fingers until completely removed.
4. Place it. SIM-The card(s) are in the tray. Notice the notch on the map, it must match the protrusion in the slot: SIM 1 - top slot, SIM 2 - Lower (or microSD).
5. Put the tray back in. Make sure the cards don't protrude beyond the edges of the tray. Put it in smoothly, without skewing, until you click.
6. Turn on your phone. Check the status bar after you boot. If the network icon doesn't show up, restart the device.

- Phone's off.

- Paperclip/key at hand

- SIM-map is trimmed to nano-format

- The tray is dust-cleaned-->

If the tray is not inserted back, don't put too much effort into it!

• 🔄 The card is set on the wrong side (turn it over).
• 📏 The tray is skewed (try to remove and insert again).
• 🚫 There is already a foreign object in the slot (dust, a fragment of an old one). SIM).

⚠️ Attention: If after installation SIM The phone says "No network" or "SIM-You don't want to blame the operator. First check if the card is inserted correctly (contacts should be pointing down), and try to wipe it with a soft cloth - sometimes the oxidation of the contacts interferes with the communication.

Frequent Mistakes and How to Avoid Them

Even with the seemingly simple procedure, users often make mistakes that lead to communication problems, and here are the most common ones and ways to solve them:

1.The phone doesn't see. SIM-map

The reasons may be different:

• 🔌 Bad contact, remove the tray and check if the contacts are contaminated. SIM-- wipe them with a wipe or an alcohol napkin.
• 📡 Inactive SIM. Make sure the card is activated by the operator. call from another phone or check the balance through USSD-command (e.g. *100# for MTS).
• 🔄 If you bought the Redmi 9 overseas, it may be locked under local operators. → The phone. → General information → Model – if there are letters at the end of the model name CN (China), IN (India) or RU (Russia, this may affect compatibility.

2.The tray is jammed.

If the tray is not removed or re-inserted:

• 🔧 Try using another tool (such as a thicker paper clip).
• 💡 Heat the case with a hairdryer (not much!) – sometimes it helps with deformation of the plastic.
• 🛠️ You can go to the service center. Don't try to pull the tray out by force, it could damage the connector.

3.The second SIM is not working.

In Redmi 9, the second SIM may not be detected if:

• 📱 The settings have disabled the second slot. → SIM-maps and mobile networks → Choice SIM-map.
• 🔄 The map doesn't support the right frequencies, Tele2 In some regions, it operates at 800 MHz, which may not be available on the Chinese versions of Redmi.
• 📡 The phone is on "Only one" mode. SIM". Turn it off in the same settings.

💡

If the second SIM doesn’t catch the network, try swapping the cards (moving the SIM 1 to the SIM 2 and vice versa), sometimes this helps to determine whether the problem is in the slot or in the card.

How to set up SIM-postcard

After successful installation SIM-You have to adjust the parameters of the cards, and this is especially important if you're using two cards from different operators:

1. Assign names. SIM-Go to the settings. → SIM-maps and mobile networks and give each card a unique name (e.g., "Worker" and "Personal.
2. Select SIM by default. Here you can specify which card to use for calls, SMS and mobile Internet by default. For example, you can configure that the Internet only works through SIM 1, and calls through SIM 2.
3. Set up roaming. If you travel frequently, turn off automatic roaming for the second. SIM, To avoid unexpected expenses: settings → SIM-map → [choose SIM] → roaming.
4. Check VoLTE support. Redmi 9 has voice call support via 4G (VoLTE), but it can be disabled. Activate it in Settings. → SIM-map → [choose SIM] → Enable VoLTE.

If you use a microSD instead of a second one SIM, Make sure that the memory card is formatted as internal storage (if you need to expand the memory for applications) or as a portable device (if you plan to transfer files to other devices). → Memory. → Memory map.

💡

After installing a new one SIM-Always reboot the phone, which helps the system to properly initialize the communication module and avoid errors such as "SIM-map not identified".

Operator and frequency compatibility in Redmi 9

Xiaomi Redmi 9 supports most Russian carriers, but there are nuances with frequencies that can affect the quality of communication.

If you are out of town or on the subway, choose a carrier with support for B20 (800 MHz) – it is better at penetrating obstacles. To check the available frequencies in your area, you can use applications like Network Cell Info Lite (available on Google Play).

Also look for the regional firmware of your Redmi 9. For example, the Chinese versions (CN) may not support some Russian frequencies. Check the firmware version in Settings → About Phone → MIUI Version. If there is CN at the end of the name, consider flashing it to the global version (Global).

What to do if SIM-map not defined

After installation SIM-The phone can’t see the card, follow the following steps to diagnose it:

1. Check the physical condition of the map. Check the contacts for scratches, dirt or oxidation. Clean them with a smooth coat if necessary.
2. Try the card on another phone. If it doesn't work and there's a problem with the SIM, contact the carrier for a replacement.
3. Update. Go to Settings → About Phone → System Update and check for updates. Sometimes SIM recognition errors are fixed in newer versions of MIUI.
4. Reset the network settings. Go to Settings. → SIM-maps and mobile networks → Network resets: This will remove stored Wi-Fi networks and mobile settings, but often helps with crashes.
5. Check IMEI. Enter the code *#06# in the phone app. If zeros or "unknown" are displayed instead of IMEI, this indicates a software failure. You can restore IMEI through the engineering menu or at the service center.

If none of these things worked, there may be a problem with the phone's communication module, which can happen after a drop, moisture, or a failed upgrade, in which case, contact Xiaomi's service center - self-repair without experience can lead to final breakdown.

⚠️ Warning: Don't try to disassemble your phone to check the antenna or communication module yourself! In Redmi 9, the plumes are attached with fragile latches, and they are easily damaged. If the warranty is still valid, repairs in an informal service will cancel it.

FAQ: Answers to Frequent Questions