Xiaomi Redmi 9 remains one of the most popular budget phones even years after its release, its reliability and functionality have been appreciated by millions of users. SIM-It would seem that it could be easier, but in practice, many people face problems: the tray does not open, the SIM does not recognize or the phone needs to be rebooted. In this article, we will discuss the process from A to Z, from tool preparation to troubleshooting.
The Redmi 9 (M2003J15SC, M2004J19C, etc.) feature is a hybrid slot that supports either two Nano-SIMs or one Nano-SIM + MicroSD card up to 512 GB. This means that if you want to expand the memory, you will have to sacrifice a second SIM. We will explain in detail how to avoid configuration errors and what to do if the phone does not see the network after installation.
Preparation: What you will need before installation SIM-map
Before you start the procedure, make sure you have everything you need on hand. Without the right tools, you risk damaging the tray or the smartphone itself.
- 📱 Xiaomi Redmi 9 (Switched Off!) Installation SIM-Cards in the enabled device may cause network failure.
- 🪛 A paper clip or a special key to remove the tray, and it comes with a plastic tool, but you can use an unbended paper clip.
If you use a memory card, check its compatibility. Redmi 9 officially supports UHS-I MicroSD (up to 512 GB), but some users experience problems when using cards larger than 256 GB. Important: before installing a MicroSD format it in the exFAT file system - this will reduce the risk of read errors.
⚠️ Warning: Never use metal objects (knives, forks, scissors) to open the tray.This can scratch the body or damage the fixation mechanism.
Where is the slot for SIM-Maps in Xiaomi Redmi 9
Unlike some flagship Xiaomi models, where the slot can be located on the upper edge, in Redmi 9 it is traditionally placed on the left end of the case.
- Hold the phone in your right hand so that the screen is directed to you.
- Look at the left side facet - there you will see a small hole with a metal rim.
- Near the hole may be a barely noticeable pictogram SIM-The map (but often not visible due to protective film).
If you’re not sure you’ve found the right place, compare the location to the photo below (or watch the video manual at the end of the article). On some Redmi 9 modifications (like the Redmi 9 Prime), the slot may be slightly closer to the bottom corner, but fundamentally it doesn’t change the process.
| Model | Slot location | Slot type |
|---|---|---|
| Redmi 9 (M2003J15SC) | Left face, middle. | Hybrid (2 Nano-SIM or 1 Nano-SIM + MicroSD) |
| Redmi 9A | Left face, closer to the top | Separate (2 Nano-SIM + MicroSD) |
| Redmi 9C | Left face, closer to the bottom | Hybrid |
| Redmi 9T | Left face, middle. | Hybrid |
If you can't find the slot, you might have a cover or a protective film on your phone that covers the hole.
Step-by-step: how to open the tray and insert SIM-map
Now, to the most critical stage, follow the instructions carefully, because errors here can lead to failure of the extraction mechanism.
☑️ Preparation for installation SIM-map
- Turn off your smartphone. It's a must! Installation. SIM-cards with the phone on can cause a modem malfunction.
- Put a paper clip in the slot hole. Push it hard, but don't overdo it -- just a click is enough. The tray should move 2-3 mm.
- Take the tray out carefully. Don't pull it around the corner, grab the side edges so you don't bend.
- Put it down. SIM-card(s. 📱 For one. SIM: Place it in the first slot (usually marked as SIM1). 📱📱 For two. SIM: Set the second card in the second slot (SIM2). Pay attention to the cutout on the tray - it should match the shape of the card. 📱💾 For SIM + MicroSD: Second SIM replace it with a memory card (slot) SIM2/MicroSD).
Put the tray back in.
Turn on the phone.
If you turn on the phone, you can’t see SIM-In 90% of cases, the problem is solved by restarting or checking the installation correctly.
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If the tray is tightly extended, warm the phone in your hands for 1-2 minutes - the plastic will become a little softer, and the mechanism will give way easier.
Common Mistakes and How to Avoid Them
Even experienced users sometimes make mistakes when installing SIM-Here are the most common ones and how to prevent them:
- 🔄 Upside down SIM-The contacts should be downward, and the cut angle should match the shape of the tray. If you mix the sides, the phone won't see the map.
- 🔌 Incomplete tray insertion. If the tray doesn't snap to the end, the smartphone may not recognize. SIM Make sure it's sitting tight.
- 📶 Using the wrong size card. Redmi 9 only supports Nano-SIM. If you have Micro-SIM or Mini-SIM, you need to cut it off (better do it in the salon).
- 🔋 Installation with the phone on, which can cause the modem to malfunction. Always turn off the device before manipulating the device. SIM.
- 📱 If the phone has been in a damp room, dry the slot with a hair dryer (cold air!) before installing the card.
⚠️ Attention: If after installation SIM-The phone says "No services" or "SIM-card not supported, check if the card is activated by the operator. SIM Often require registration in a personal account or by phone hotline.
Another common problem is the conflict between the two SIM-If one of the cards is working in the standard 4G, And the second one is in 2G, You can see an unstable signal. In the settings of Redmi 9, you can prioritize the network for each signal. SIM separately:
- Go to Settings. → SIM-maps and mobile networks.
- Choose the right one. SIM-map.
- Click Network Type and install 4G (recommended).
What if the tray is jammed?
How to check if the phone recognizes SIM-map
After installation SIM-You need to make sure that the phone recognizes the card correctly:
- Check the network indicator. The top notification bar should display signal icons (e.g., 4G, LTE, 3G). If they are not, move on to the next step.
- Go to the settings. SIM-Path: Settings → SIM-maps and mobile networks. This should show the numbers of the installed cards.
- Try making a call. Dial it. USSD-an operator command (e.g. *100# for MTS or *111# for Beeline) If the call fails, the problem may be in the card or network.
- Check the IMEI. Type *#06# in the dialer. If two IMEIs are displayed (this is normal for Redmi 9), then the phone recognizes the slot, but the problem may be in the SIM.
If the phone can't see SIM-Map, try the following steps:
- 🔄 Reboot the phone.
- 📱 Remove and re-insert. SIM-map.
- 🔧 Reset network settings: Settings → System system → Resetting settings → Resetting Wi-Fi, Mobile Network and Bluetooth.
- 📞 Contact the operator - perhaps, SIM-Card is blocked or requires replacement.
If none of these methods helped, the problem could be a malfunction. SIM-In this case, we recommend you to contact the Xiaomi service center.
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If the phone sees SIM-map, but no network, check the settings APN. Path: Settings → SIM-maps and mobile networks → [choose SIM] → Access points (APN). Usually the parameters are loaded automatically, but sometimes they have to be entered manually (the data can be requested from the operator).
Compatibility of Xiaomi Redmi 9 with operators and communication standards
Xiaomi Redmi 9 supports a wide range of networks, but there are nuances to be aware of:
- 📶 4G LTE. The phone works in all Russian 4G-network (B1/B3/B7/B20). Maximum download speed - up to 150 Mbit/s (depending on operator).
- 📡 3G and 2G. Supported for backward compatibility, but the speed will be significantly lower.
- 🚫 5G. Redmi 9 doesn’t support fifth-generation networks – it’s a 2020 budget model.
- 🌍 Roaming.The phone is compatible with most foreign operators, but for stable roaming operation, we recommend you to include the option "Automatic network selection".
If you plan to use Redmi 9 abroad, please note that some carriers (such as those in the US or Japan) operate in non-standard bands that may not be supported by your phone.
| Region | Supported ranges | Possible challenges |
|---|---|---|
| Russia | LTE B1/B3/B7/B20 | No. |
| Europe | LTE B1/B3/B7/B20 | No. |
| USA | LTE B2/B4/B5/B7 | No B12/B13/B17 support (may not work with Verizon) |
| China | LTE B1/B3/B5/B8 | No support for B34/B38/B39/B40/B41 |
To verify the current communication standard:
- Go to Settings. → SIM-maps and mobile networks.
- Choose an active one SIM-map.
- Click Network Type – the current standard (2G, 3G, 4G) will be displayed here.
Frequent questions and problem-solving
We have collected answers to the most popular questions of users Xiaomi Redmi 9, related to SIM-cards.
The phone can't see. SIM-map after installation?
Can we use two? SIM-card and memory card simultaneously?
How to trim Micro-SIM to Nano-SIM for Redmi 9?
Why does the phone show "Emergency Calls Only"?
How to transfer contacts with the old SIM-maps on Redmi 9?
Video instructions and additional materials
If you are easier to perceive information visually, we recommend watching the official video from Xiaomi on installation. SIM-maps in Redmi 9:
Video: How to insert SIM-Map in Xiaomi Redmi 9" (insert a link here to YouTube or embed the player).
Also useful materials:
- 📄 Official Xiaomi documentation (user manual for Redmi 9).
- 🛠️ List of Xiaomi service centers in your city.
- 📡 Coverage map 4G Operators (check your provider’s coverage area).
If you have any questions or are faced with an unusual situation (for example, a tray broke or the phone does not respond to SIM after a fall), describe the problem in the comments - we or other users will try to help!