How many? SIM-cards supported by Xiaomi Redmi Note 9 Pro: disassemble the hybrid slot and all the nuances

Xiaomi Redmi Note 9 Pro remains one of the most popular smartphones in the budget segment even years after the release. SIM-Can you install cards in this model? The answer is not as simple as it seems — it depends on the configuration of the hybrid slot and your needs. SIM-cards, compatibility with memory cards, and also give practical tips on optimal configuration.

Many people mistakenly think that the Redmi Note 9 Pro supports two. SIM-It's actually a hybrid slot, which means you have to choose between the other one. SIM-We'll tell you how to get around the limitations, what formats. SIM They're all right, and what to do if your smartphone doesn't see one of the cards, and you'll also learn about the hidden dual settings. SIM and the nuances of working with communication operators in different regions.

Technical characteristics of the SIM slot in Redmi Note 9 Pro

Xiaomi Redmi Note 9 Pro (codenamed joyeuse) comes with a hybrid slot for nano-SIM, which means that there are only two slots in the phone, but they can be used in different ways:

• 📱 Two nano-SIMs (without memory card)
• 📱 + 💾 One nano-SIM + microSD (up to 512 GB)

It is important to understand that two people are used simultaneously. SIM-It's an architectural limitation, built by the manufacturer, and it supports Dual. SIM Dual Standby (DSDS) — both SIM-The cards may be active at the same time, but during a conversation, the second one will not be available.

Technical details of the slot:

Note: In some regions (for example, India) sold a modification with a dedicated slot for microSD, but in the international version (Global) always used a hybrid version. Check your modification by marking on the box or in the settings along the Settings path → About Phone → MIUI version.

How to insert it correctly SIM-maps: step-by-step instructions

Incorrect installation SIM-Cards may cause damage or network recognition problems. Follow this instruction to avoid errors:

1. Turn off the phone is a prerequisite for safe installation.
2. Find a slot for SIM-cards on the left side of the smartphone (near the volume buttons).
3. Use a paper clip or a special key from the kit to remove the tray.
4. Place the nano-SIM in the tray according to the markup (skip up).
5. If you set two SIM-maps, put them in nests SIM1 and SIM2.
6. For microSD, use the SIM2 socket (instead of the second SIM).
7. Carefully insert the tray back before the click.

After turning on the phone, it can take up to 2 minutes to initialize the cards. If one of the SIMs is not identified, try:

⚠️ Note: Never insert a microSD into the nest SIM1 — This can damage your contacts. Also avoid using micro-SIM or standard adapters. SIM, Because they're not suitable for nano format. SIM vs Single SIM: What to choose? Choice between one or two. SIM-So, the maps depend on what you're doing. Let's take a look at the pros and cons of each option: SIM-cards (without microSD) ✅ Separation of personal and work – convenient for those who use two numbers. ✅ Savings on roaming – you can use local SIM travelling. ✅ Backup channel – if one operator is “lying”, the second can work. ❌ There is no room for microSD – you will have to be satisfied with the built-in memory (64/128 One GB. SIM + microSD ✅ Additional storage – relevant for fans of photo / video or heavy games. ✅ Low price - microSD for the 256 GB is cheaper than a smartphone with 256 GB memory. ❌ No backup number – if your phone breaks, you will be left without communication. ❌ Speed Limitation – Some MicroSD Classes A1 It's slower than the internal memory. SIM-maps and additional memory, consider using cloud storage (Google Drive, Mi Cloud) or OTG-The last one can be connected via an adapter. USB-C → USB-A, It is less convenient than a built-in microSD. 💡If you travel frequently, the best option is to have one physical. SIM (main) + Unfortunately, the Redmi Note 9 Pro does not support eSIM, but this feature can be emulated through applications like Airalo (virtual). SIM). Operator Compatibility and Network Settings Redmi Note 9 Pro Supports Dual 4G VoLTE, which means that two people can work simultaneously. SIM-map 4G. But there are nuances: 🌍 Regional restrictions – some operators (e.g. in the U.S.) may block the operation of a second SIM. 📶 Network priority – by default voice calls and SMS come on SIM1. ⚡ Internet speed – when talking about one thing SIM The other one is temporarily out of touch to prioritize. SIM-Maps: Go to Settings → SIM-maps and mobile networks. Select settings SIM1/SIM2. Set up a preferred network type (4G/3G/2G) For each card, in the call section, select which one SIM default. ⚠️ Note: If you use two of these SIM-cards of the same operator (for example, two "Beeline"), there may be problems with incoming calls. This is due to network limitations. + Television2). To check compatibility with your carrier: How to check for Dual support SIM Go to the operator's website and find the "Phone Settings" or "Device Support" section. Enter the Redmi Note 9 Pro model (code) M2003J6A1G If the model is on the compatible list, problems are unlikely. Frequent problems and solutions even if installed correctly. SIM-And these are the most common problems that people have with maps, and the ways to fix them: 1. The phone doesn't see one of them. SIM-map 🔄 Reboot – sometimes it helps to just turn off/on. 🧹 Cleaning contacts - wipe off SIM and a tray of alcohol napkin. 🔧 Resetting network settings - the path: Settings → System system → Resetting settings → Resetting network settings. 📶 Manual Network Search - in Settings SIM Choose to search for networks manually. 2. Low signal level on one of the SIM This may be due to antenna restrictions – in the Redmi Note 9 Pro, the main antenna is sharpened under the control of the antenna. SIM1. Decisions: 📡 Change it. SIM-maps in places (transfer the main map to the SIM1). 📴 Turn off automatic network selection and select 4G manually. 🏠 In the area of bad signal use Wi-Fi calls (setting in the menu) SIM). 3. the mobile Internet does not work on the second SIM A common problem when using two SIM. Check it out: 🔗 Settings APN — They must be downloaded automatically, but sometimes manual input is required. 🚫 Turn off data in roaming for the second SIM, If it is not used for the Internet. 🔄 Switch the main one. SIM If the problem persists, check if your tariff supports the simultaneous operation of two SIM into 4G. Some operators (e.g. Yota) limit this feature. Alternative solutions: how to get around the limitations of a hybrid slot Hybrid slot is a compromise between functionality and compactness of the device. SIM, MicroSD, and consider these options: 1. USB OTG + Connect the flash drive. USB-plug-in USB-C → USB-A. Cons: ❌ Occupying the charging port. ❌ Slower than microSD (especially when recording video). ❌ Not all applications support the work with OTG-2. the transmission of data without wires. 📤 Use cloud services (Google Photos, Mi Cloud) to automatically upload photos/video. 🖥️ Set up PC sync over Wi-Fi (via Mi) PC Suite). 📡 It's good for music and documents. NAS-server FTP. 3. Replacement SIM eSIM (partially) Although the Redmi Note 9 Pro does not support eSIM hardware, it is possible to use the same device: 📱 Use virtual numbers (services like DingTone or TextNow). 🔄 Move the second number to another eSIM-enabled phone (e.g. iPhone or Google Pixel). ⚠️ Attention: When in use OTG-Storage flash drives turn off automatic download of media files in messengers (WhatsApp, Telegram). Permanent recording on an external drive reduces its lifespan. 💡The hybrid slot in the Redmi Note 9 Pro is not a drawback, but a design feature. The manufacturer sacrifices versatility for the sake of a thin body and a large battery (5020 mAh). SIM and microSD, consider models with dedicated slots (e.g. Redmi Note 10 Pro or POCO X3 For clarity, compare the Redmi Note 9 Pro with other popular models for support SIM-Cards: Model Dual slot type 4G VoLTE Max. microSD eSIM Redmi Note 9 Pro Hybrid (2+1) Yes. 512 GB No Redmi Note 10 Pro Hybrid (2+1) Yes. 1 TB No POCO X3 Pro Hybrid (2+1) Yes. 1 TB No Mi 11 Lite Hybrid (2+1) Yes. 1 TB No Black Shark 4 Highlighted (2+1) Yes. 1 As you can see from the table, hybrid slots are found in most budget and mid-budget Xiaomi models. the exception is gaming smartphones (Black Shark) and flagships (for example, Mi Mi). 11 Ultra, where dedicated slots are used. If you are critical to the ability to use two SIM microSD and microSD at the same time, when choosing a new phone, pay attention to the wording "3 slot (2 nano-SIM + microSD)" in characteristics. FAQ: Frequently Asked Questions Is It Possible in Redmi Note 9 Pro to use microSD and two SIM-No, it's not possible because of the hybrid design of the slot. SIM-memory-card. The alternative is to use OTG-flash drives or cloud storage. SIM-The card will be the main call and SMS? The default is the primary SIM1, But this can be changed in the settings: Settings → SIM-maps and mobile networks → Here you choose which one SIM use for outgoing calls and SMS. Does the Redmi Note 9 Pro support the two? SIM-card 4G Yes, the model supports Dual. 4G VoLTE, but with reservations: during an active conversation, one SIM The second one is temporarily disconnected from the network, and some operators may limit this function at the tariff level. SIM-A card and microSD from other manufacturers (not Xiaomi)? Yes, there are no restrictions on the brand. SIM-cards and microSD (up to 512 GB) for memory cards. A1 or A2 for better productivity. What to do if you update after the update MIUI one of them stopped working. SIM-This is a well-known problem with some versions of maps. MIUI. Try: Reset your network settings (Settings) → System system → Resetting settings → Reset network settings. Reverse to the previous version MIUI via Fastboot (instructions for 4PDA). Contact the service center if the problem is hardware (damage to the slot contacts).