Xiaomi Redmi 4X: how much SIM-Does the full hybrid slot guide support cards?

Xiaomi Redmi Smartphone 4X It remains a popular choice among users who value the balance of price and functionality, and one of the key questions when buying is how much. SIM-The device supports the cards and how the memory is organized. In this article, we will discuss in detail the configuration of slots, the nuances of the hybrid solution, and give practical recommendations for using the device.

Model Redmi 4X (The codename santoni was released in 2017, but it's still in demand in the secondary market, and it's a hybrid slot that raises the most questions. SIM-We'll analyze all the possible combinations, and we'll also tell you how to install the cards correctly to avoid problems with communication or data storage.

It is important to note that information on the amount SIM-The cards are often contradictory in different sources. Some vendors indicate "2" SIM + microSD", others "2 SIM 1 SIM + We will understand where the truth and where the marketing move, and explain how the hybrid slot in Redmi works in practice. 4X.

Technical characteristics of the slot SIM-map 4X

Xiaomi Redmi Smartphone 4X It is equipped with a hybrid card slot that combines functions for two nano-SIMs or one nano-SIM. + microSD. This is typical of Xiaomi's budget models of the period. Let's get into the details:

• 📱 Type of slot: hybrid (combo-slot), combined with a tray for a memory card.
• 🔄 Configuration options: Two nano-SIMs (without microSD) One nano-SIM + microSD (up to 256 GB)
• 🌍 Network support: 4G LTE (Band 1/3/5/7/8/38/40), 3G, 2G. Both SIM-The cards can work in the mode 4G, There will be only one active at the same time (the second one will be active). 2G/3G).
• ⚡ Additional: VoLTE and ViLTE support (depending on firmware and operator).

A hybrid slot means that there are only two slots physically in the phone, one for the first nano-SIM and the other for the universal (nano-SIM or microSD) slot, which imposes limitations: you can not use two at the same time. SIM-I'll have to choose between a card and a memory card:

• 📞 Two numbers (without memory expansion)
• 💾 One number. + storage

If you choose the microSD option, the second one is SIM-The card will not be recognized by the system. This is not a fault, but a design feature. It is also worth considering that with a microSD, the read/write speed can be lower than that of the internal memory (especially if the card is a class 10 or lower).

What does the tray look like for SIM-maps: photos and diagrams

Card tray at Redmi 4X It is designed in standard Xiaomi design: metal clip with slots under nano-SIM and microSD. To avoid errors during installation, pay attention to the following details:

• 🔍 Size: the tray is designed for nano-SIM (4FF). If you have a card of a different format (micro or standard), you will have to cut it or use an adapter.
• 📏 Location: First socket (closer to the edge of the phone) - always under the SIM. The second nest (closer to the center) is a hybrid (SIM microSD).
• 🔄 Chip side: when installed SIM-The chip should be directed downwards, and the beveled corner should be directed to the tray.

Below is a scheme of correct installation of cards:

⚠️ Note: if you insert a microSD into the first socket (designed only for the first socket) SIM), The phone won't recognize it. Don't try to insert two. SIM-Maps to the hybrid nest – this can damage contacts.

To remove the tray, use a paper clip or a special key (it comes with a set) insert it into the hole next to the slot and press the tray slightly, the tray will extend out, make sure that the cards fit tightly into the contacts, otherwise the phone will not detect them.

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If the phone can't see SIM-If you want to do this, try to bend the metal contacts in the tray slightly with a flat screwdriver, sometimes they're unbended by frequent use.

How to set up the work of two SIM-map

If you have chosen a configuration with two SIM-You need to set them up properly on the system. 4X Offers flexible management options:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose. SIM-map: 📞 Calls (by default) 📶 Mobile data 💬 SMS (separately SIM)

Double. SIM-map

Set up names for cards (such as “Worker” and “Personal”) to avoid confusing them.

Important nuances:

• 🔄 Network switching: if one SIM mode 4G, The second one automatically moves on 2G/3G. To have both work in 4G, You need to manually select the network in the settings (but this will reduce the speed of the Internet).
• 📵 Shutdown SIM: You can deactivate one of the cards without physically removing it (useful in roaming).
• 🔋 Energy consumption: two active SIM-slightly increase battery consumption by 5–10%).

⚠️ Note: If after installation of the second SIM-The phone stopped seeing the first card, check it out:

Installation correctness (chip down, bevelled corner to tray), no damage to the card (scratching contacts), operator compatibility (some virtual operators are not supported).

If problems persist, try restarting your phone or resetting your network settings in Settings. → System system → Resetting settings → Resetting network settings.

MicroSD Compatibility: Which Memory Cards Are Right

If you have chosen the configuration "1" SIM + MicroSD, it's important to pick up the right memory card. 4X Supports microSD up to 256 GB, but there are nuances:

• 📁 Format: only FAT32 exFAT. NTFS unsupported.
• ⚡ Speed class: Class 10 or Class 10 is recommended UHS-I videotape 4K.
• 🔒 Manufacturers: Better to choose proven brands: SanDisk, Samsung, Kingston. Cheap no-name cards can slow down or fail.

Before buying, check the card for compatibility:

1. Insert the microSD into the slot.
2. Go to Settings. → Warehouse.
3. If the card is determined, format it via your phone (this will delete all data!).
4. Choose the use case: Portable storage (for files) or Internal memory (system extension, requires reboot).

⚠️ Note: if you select the option "Internal Memory", the card can not be retrieved without losing data. It will become part of the system and will be encrypted.

Also note that some apps (such as WhatsApp or Telegram) can’t transfer data to a microSD.

Frequent problems and their solutions

When using a hybrid slot in Redmi 4X And so, users are facing typical problems, and we're going to look at the most common problems and how to fix them:

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

Possible causes and solutions:

• 🔌 Bad contact: Remove the tray, wipe the map and contacts with dry cloth, then insert back.
• 🔄 Incorrect firmware: If the phone is stitched with custom firmware (like LineageOS), there may be no support for dual-strength SIM. Get back to the official one. MIUI.
• 📡 Operator problems: check if the operator is blocking work in your area (relevant for tourist destinations) SIM).

2. It's not working. 4G second SIM

By default, Redmi. 4X one-on-one SIM may work in 4G. To turn on 4G second:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose the second. SIM Set up a preferred network type: 4G.
3. Reboot the phone.

Please note: in this case, the first SIM pass over 2G/3G.

3. microSD is detected but slows down

If the memory card is running slowly:

• ⚡ Check the speed class (should be no lower than Class 10).
• 🗑️ Format the card on your phone (not on PC!).
• 🔧 Update the firmware to the latest version MIUI.

If problems persist, try another card - the current one may be damaged.

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Hybrid slot at Redmi 4X It does not support the simultaneous operation of two SIM-It's a hardware constraint that you can't get around software.

Comparison with other Xiaomi models

To understand how convenient the hybrid slot in Redmi 4X, Compare it to other popular Xiaomi models of the same period:

As you can see from the table, Redmi 4X The hybrid slot was the standard solution for budget smartphones of 2017. 5A We have already offered a more convenient configuration with separate slots.

If you are critical to the opportunity to use two SIM-cards and memory cards at the same time, it is worth considering newer Xiaomi models (for example, Redmi 9 or a memory card). POCO M3), where this restriction is removed.

Recommendations for choosing a configuration

Which slot use case to choose depends on your tasks. Let's consider typical scenarios:

1. Two. SIM-cards (without microSD)

Suitable if:

• 📞 You need two numbers (e.g. work and personal).
• 🌍 You travel frequently and use locals. SIM-map.
• 💾 You have enough built-in memory (16/32 GB).

Cons: you can not expand the memory, you will have to regularly clean the cache and delete unnecessary files.

2. One. SIM + microSD

Optimal if:

• 📷 You take a lot of pictures or make videos.
• 🎮 You are playing heavy games (for example, PUBG Mobile or Genshin Impact).
• 🎵 Keep a large media library (music, movies).

Cons: you can not use the second number, you have to switch between SIM, If you need a second operator.

Alternative solutions

If you need two. SIM, extra memory:

• 🔄 Use Google Drive (Mi Cloud) for backups.
• 📱 Buy it. OTG-adapter for connecting a flash drive (but it is inconvenient for constant use).
• 🔧 Consider replacing it with a model with separate slots (e.g. Redmi). 5A or Redmi 6).

⚠️ Note: if you switch between configurations frequently (these are two) SIM, piece SIM + microSD, this can cause tray contacts to wear out. Try to choose one option and stick to it.

FAQ: Frequent questions about SIM-maps 4X