How do you put two in? SIM-Memory cards and cards in Xiaomi Redmi 4X: hybrid-slot

Xiaomi Redmi 4X

2017

hybrid-slot SIM-map

two nano-SIMs

one SIM + microSD

all possible combinations

Redmi 4X owners often ask questions like, "Can I insert two SIMs and a flash drive at the same time?", "Which memory card is right?" or "Why doesn't the second SIM work after installing a microSD?". The answers lie in the design of the smartphone and the system settings. We will not only show you step-by-step installation instructions, but also reveal hidden MIUI settings that will help avoid conflicts between cards.

It's important to understand that a hybrid slot is a trade-off between functionality and compactness. The manufacturer sacrifices versatility for a thin package, so the user has to choose between dual communication or extended memory. But the good news is that when set up properly, you can minimize inconvenience.

Slot design: what is inside the Redmi 4X

Xiaomi Redmi 4X uses a hybrid card tray that combines:

• 📱 Slot 1 – for nano-SIM only (main card, supports) 4G)
• 📱💾 Slot 2 is hybrid, can accept either nano-SIM or microSD (up to 256 GB)

This means that you can not insert two SIMs and a flash drive at the same time – you will have to choose between:

• ✅ Two. SIM-cards (without memory card)
• ✅ One SIM + microSD (without the second) SIM)

The card tray is on the left end of the smartphone, and you'll need a paper clip or a special key to remove it, and there's a tag on the tray that tells you which side to insert the cards, which will help you avoid mechanical damage.

Important: Slot 2 does not support 4G when using the second SIM. If you insert two cards, the Internet will work only on the main one (Slot 1), and the second one will only be able to call and send SMS. This is a hardware limitation, and it is impossible to bypass it.

Which memory card to choose for Redmi 4X?

The smartphone supports microSD up to 256 GB (officially announced), but in practice, more cards (for example, 512 GB) work, if they are formatted in FAT32 or exFAT.

Recommended Memory Card Parameters:

• 🔹 Speed class: not lower than Class 10 (or UHS-I videotape 4K)
• 🔹 Format: microSDHC (up to 32 GB) or microSDXC (up to 64 GB)
• 🔹 Brands: SanDisk Ultra, Samsung EVO, Kingston Canvas (Avoid No-Name)

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Note: MicroSD cards from unknown manufacturers may cause data freezes or loss. Check the reviews on forums (e.g. 4PDA or Mi Community) before buying.

If you plan to record high-resolution video or install heavy games, it is better to choose a card marked A1 or A2 – they are optimized for working with applications.

Step-by-step: how to insert two SIM or SIM + microSD

Before installing the cards, turn off your smartphone to avoid damaging your contacts.

Installation of two SIM-map:

1. Insert the first nano-SIM into Slot 1 (SIM1 tag on the tray).
2. Insert the second nano-SIM into Slot 2 (SIM2/microSD tag).
3. Carefully push the tray to the click.

Installation of one SIM + memory card:

1. Insert nano-SIM into Slot 1.
2. In Slot 2, place a microSD (contacts down!).
3. Make sure the memory card does not protrude beyond the edges of the tray.

When you turn on your smartphone, it automatically detects the cards, and if the microSD doesn't recognize you,

• 🔄 Reset the device.
• 🛠️ Check the card on another device (it may be damaged).
• ⚙️ Format it through Settings. → Memory.

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If your smartphone doesn’t see the second SIM, try swapping the cards, sometimes the problem is a malfunction of the slot or an incompatibility of the operator.

Setting priorities SIM-card MIUI

After installing two SIM-You need to set your priorities to avoid confusion with calls and the Internet:

1. Go to Settings. → SIM-maps and mobile networks.
2. Select Control. SIM-map.
3. Set up: 📞 Calls: Choose SIM by default or "Always ask". 📶 Mobile Internet: activate only on Slot 1 (Slot 2 does not support 4G). 💬 SMS: state the main SIM message-post.

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Note: If Slot 2 has an all-inclusive SIM but the internet is not working, check the APN settings. Some operators (e.g. Tele2) require manual settings.

For convenience, you can assign names to the cards (for example, "Worker" and "Personal"). SIM-map.

How to transfer applications to a memory card

If you choose a 1 SIM + microSD configuration, you can free up internal memory by transferring some applications to the map.

• ✅ Only those applications that support this function are ported (not all games / social networks allow this).
• ❌ System applications (MIUI Launcher, Settings cannot be moved.
• ⚠️ After the transfer, the application can run slower (depending on the speed of the card).

Instructions for transfer:

1. Open Settings → Applications → Application Management.
2. Select the app you want (such as WhatsApp).
3. Click Warehouse → Change → Memory Map.
4. Confirm the transfer (reboot may be required).

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Warning: If you remove the microSD after you transfer the applications, they will stop working! Before you retrieve the cards, return the applications to internal memory.

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ExFAT memory cards support files larger than 4GB, but may not work properly with some applications. For compatibility, format the card in FAT32 (maximum 32GB) or NTFS (requires root).

Frequent problems and their solutions

Even with the right card installation, Redmi 4X users face typical problems.

If after installing the microSD smartphone began to slow down or give errors, try:

• 🔄 Reset the device.
• 🧹 Clear the cache in Settings → Memory. → Cleanup.
• 🛠️ Test the card on another device (it may be fake).

Alternative ways to expand memory

If you are missing a memory, you need to save two SIM-maps, consider alternatives:

• ☁️ Cloud storage: Google Drive, Mi Cloud or Yandex Disk (free up to 15 GB).
• 🔌 OTG-drive: plug-in flash drive USB-C MicroUSB (connected via adapter).
• 📁 Memory optimization: Delete cache, transfer photos/video to PC, use Lite versions of applications.

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Attention: When in use OTG-Note that the storage device will occupy the charging port. You will need to charge and connect the flash drive simultaneously. USB-hub.

If you move files between devices often, it’s more convenient to use a wireless drive (e.g., Xiaomi Mi WiFi Router with a wireless drive). USB-It creates a local area network that you can connect to from your smartphone.

FAQ: Answers to popular questions