Xiaomi Redmi 9 remains one of the most popular budget smartphones even years after its release, but users are still confused about how much they want. SIM-Can you install the cards in this model? Official specifications are often vague, and sellers in stores give conflicting answers. In this article, we will discuss in detail all the versions of the Redmi 9, their differences in slots, compatibility with operators and the nuances of using the two SIM-mapping.
Spoiler: the answer depends on the specific version of the smartphone! in the Redmi 9 lineup there are models with 2 physical slots (one nanoSIM + hybrid slot) and 3 slots (two nanoSIM + separate microSD). But even that's not all: in some regions, unique modifications with other combinations were sold. We collected all the relevant information for 2026, including verified data from Xiaomi service centers.
If you are planning to purchase or have already encountered problems with installation SIM-This article will help you avoid errors, and we will also tell you how to check the number of slots in your device, even if you do not have a box or documentation.
Official Features: What Does Xiaomi Say?
According to the official Xiaomi website, the base model Redmi 9 (codename Lancelot) supports:
- 📱 Two nanoSIM cards (Dual) SIM) one nanoSIM + microSD memory card (up to 512 GB).
- 🌐 Support 4G LTE both SIM-maps (but not simultaneously!).
- ⚡ Dual VoLTE technology – the ability to call on the network 4G both SIM-Cards (if the operator supports the).
However, here lies the catch: the description does not indicate that the slot for the second SIM-So, the cards and the microSD are hybrid, which means you can't use two. SIM-I'll have to choose between two cards and a memory card. SIM, one SIM + microSD.
Important: In some regions (e.g. India), Redmi 9 Prime was sold with a separate microSD slot, which allows you to use two nanoSIM + memory card at the same time.
How to find out the number SIM-Slots in your Redmi 9?
If you have already bought a smartphone or are planning to buy used, here are 4 reliable ways to check the number of slots:
- Look at the tray for SIM-map: 🔍 If the tray has two separate sockets for nanoSIM, you have a hybrid version (2). SIM 1 SIM + microSD). 🔍 If the tray has three slots (two for nanoSIM and one for microSD) – you’re lucky, it’s a rare modification with full 3 slots.
Check the model in the settings
Go to Settings. → The phone. → Model: If the title has the word Prime (e.g., Prime, M2004J19PI For Redmi 9 Prime, you probably have 3 slots.
AIDA64
Download the application from Google Play, open the Network section → SIM-It will show the number of cards supported.
Look at the box or documentation
The original packaging usually has a sticker that says “Dual SIM” or “Triple Slot”.
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If you buy Redmi 9 with your hands, be sure to ask the seller to remove the tray for the first time. SIM-This will save you from cheating with the number of slots.
Table: comparison of Redmi 9 modifications by slots
So to keep the versions in perspective, we've put together a comparison table, and you can look at the model code, which you can find on the sticker under the battery or in the phone settings.
| Model | Device code | Number of slots | Support for microSD support | Sales region |
|---|---|---|---|---|
| Redmi 9 (standard) | M2004J19G, M2004J19C | 2 nanoSIM or 1 nanoSIM + microSD | Yeah (hybrid slot) | Europe, Russia, China |
| Redmi 9 Prime | M2004J19PI | 2 nanoSIM + microSD | Yeah (separate slot) | India, some Asian countries |
| Redmi 9A | M2006C3LG, M2006C3MG | 2 nanoSIM or 1 nanoSIM + microSD | Yeah (hybrid slot) | The world market |
| Redmi 9C | M2006C3MI | 2 nanoSIM + microSD | Yeah (separate slot) | Europe, Latin America |
| Redmi 9T (POCO M3) | M2010J19SG | 2 nanoSIM + microSD | Yeah (separate slot) | The world market |
Important: If your model is not listed in the table, check the device code in the settings. Some regional versions (e.g., for Africa) may have unique slot configurations.
How to properly install SIM-maps in Redmi 9?
Even if you know the number of slots, the wrong installation SIM-The cards may cause damage or lack of network:
Turn off your phone (required!).
Find a tray for SIM-card on the left side of the smartphone.
Use a paper clip or special key to remove the tray.
Place the nanoSIM card(s) in the appropriate sockets (contacts down).
If you install a microSD, place it in a separate slot (if any).
Carefully insert the tray back before the click.
Turn on your phone and check for detection SIM-card-setting.
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⚠️ Warning: Never try to insert a microSD into a nanoSIM slot - it can damage contacts! SIM-map: if you insert both, the smartphone recognizes only SIM.
Also pay attention to the order of slots:
- 📶 Slot 1 (SIM 1) — Mainstream, supportive 4G/3G/2G.
- 📶 Slot 2 (SIM 2) — In some regions, it can only work in 2G/3G.
Change the priority of the network for each SIM-maps, go to: Settings → SIM-maps and mobile networks → Settings SIM-map.
Frequent problems with SIM-Redmi 9 maps and their solutions
Redmi 9 users often face typical problems when working with two of the two. SIM-Here are the most common cases and how to fix them:
- The phone doesn't see the second. SIM-map: 🔄 Reset the device. 🔧 Check if the card is installed correctly (contacts should be clean). 📡 In settings, enable the option Automatic network selection for the second SIM. 🔨 If nothing helps, upgrade your firmware to the latest version (instruction below).
- The mobile internet is not working on one of the SIM: Go to Settings. → SIM-maps and mobile networks → Access point (APN) and adjust the settings manually (request the data from the operator).
- The smartphone overheats when using two SIM: This is normal for budget smartphones with the active use of two networks: ❄️ Turn off background data transfer for the second SIM. 📴 Use the mode Only 2G second SIM, if not 4G.
Why does Redmi 9 not support 5G?
⚠️ Note: if after the firmware update, both of them stopped working SIM-maps, perform network reset: Settings → System system → Resetting settings → Resetting network settings.
This will remove the saved Wi-Fi passwords, but will return the factory settings of the mobile network.
Can I add a second slot for you? SIM-maps in Redmi 9?
Unfortunately, physically add a slot for the second. SIM-It's not possible. It's not designed to be modified, because all the slots are sealed on the motherboard:
- 🔄 Use eSIM (if your carrier supports): Some Redmi 9 modifications (e.g. for the European market) support virtualization. SIM-card (eSIM) Check for option in Settings → SIM-map → Add eSIM.
- 📱 Buy a microSD adapter in nanoSIM: If you have a hybrid slot, you can purchase an adapter that allows you to insert a microSD into the slot for the second nanoSIM. However, this solution is unstable and can lead to loss of communication.
- 🔧 Use cloud storage instead of microSD: If you need two SIM-maps but lack memory, consider options with Google Drive, Mi Cloud or memory cards OTG (through USB-adapter).
❌ What can't be done:
- Trying to sell an additional slot on your own will lead to loss of warranty and risk of damage to the board.
- Using "Chinese" firmware to unlock slots - this can disrupt the modem.
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If two are critically important SIM-MicroSD and card cards at the same time, consider buying a Redmi model. 9C or Redmi 9T — They have three full-fledged slots.