Xiaomi Redmi Note 4X — One of the most popular smartphones of 2017, which is still in use today because of its reliability and balanced performance, but many users still have confusion about the number of smartphones they use. SIM-There's a lot of conflicting information on the Internet, where you can see two slots, and three slots, and you can see how many Sims you can put on the Redmi Note. 4X, What modifications are there and how to properly exploit them.
It is important to understand that the number SIM-The maps are not only based on the model, but also on the regional version, for example, Chinese and global versions may differ in network support and number of slots. In this article, we will look at all the nuances, including compatibility with microSD, the features of working two Sims at the same time and possible problems when setting up.
If you are planning to buy a Redmi Note 4X b/d or are already having trouble installing cards, this guide will help you understand all the subtleties. We will also answer frequent questions: can you use two SIM + microSD, how to activate a second SIM and what to do if the phone does not see one of the cards.
Official characteristics: how many SIM-maps in Redmi Note 4X?
According to official specifications from Xiaomi, the Redmi Note 4X supports two nano-SIM cards (4FF) or one nano-SIM + microSD up to 256 GB. However, there is an important nuance: the design of the tray depends on the modification of the device.
- 🌍 Global version (Global) – two separate slots: one for SIM, second, hybrid (SIM microSD).
- 🇨🇳 Chinese version (China) - two slots under SIM-cards, without microSD support (most of the time).
- 📱 Special editions (for example, for India) – can have three slots (two slots). SIM + microSD, but this is rare.
To determine your modification accurately, check the marking on the box or in the phone's settings along the Settings path → About Phone → MIUI version. If there's a Global in the title, then you have a hybrid slot. Unless China is likely two SIM slots without a microSD.
Related: 90% of Redmi Note cases 4X It has a hybrid slot, so you can’t use two at the same time. SIM-It's a limitation of architecture that you can't get around software, and if you want two SIMs and a microSD, you have to choose between two. SIM (memoryless or one SIM + microSD.
What does the tray look like for SIM-maps in Redmi Note 4X?
Externally, the Redmi Note 4X tray is a metal plate with notches under nano-SIM. To remove it, you will need a paper clip or a special key (included), located on the left end of the case, next to the volume buttons.
Visually determine the number of slots can be based on the following signs:
| Type of tray | Appearance | Support |
|---|---|---|
| Hybrid (Global) | Two notches: one for SIM, the second for SIM or microSD | 1 nano-SIM + 1 nano-SIM or 1 nano-SIM + microSD |
| Double (China) | Two notches only for SIM-cards | 2 nano-SIM, no microSD |
| Triple (rarely) | Three notches: two for SIM, one for microSD | 2 nano-SIM + microSD |
If you are not sure what kind of tray is on your phone, do the following:
- Turn off your smartphone (required!).
- Insert the paperclip into the hole next to the slot and carefully remove the tray.
- If the second notch says SIM2/microSD, then the slot is hybrid.
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Do not try to insert microSD into a slot that is not designed for it – this can damage contacts and lead to inoperability. SIM-map.
Can we use two? SIM-MicroSD cards and microSD cards simultaneously?
No, most Redmi Note 4X versions don't, except for rare special versions (such as some Asian markets) that feature a third slot, and standard global and Chinese versions will have to choose:
- 📱 Two. SIM-cards without memory card.
- 💾 One. SIM + MicroSD: The second SIM will not work.
If you are critically important to two SIMs and additional memory, consider the following options:
- 🔧 Set up the second. SIM eSIM (if your carrier supports it) but Redmi Note 4X It does not have eSIM hardware support.
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99% of Redmi Note cases 4X It does not support the simultaneous operation of two SIM-It's a hardware limitation that you can't get around without modifying your phone.
Some users try to “deceive” the system by inserting an adapter for two SIMs into the hybrid slot, but this is fraught with:
⚠️ Attention: Use of adapters "2 SIM In one slot, "one" can cause network loss, overheating of the communication module or even damage to the motherboard.
How to insert it correctly SIM-maps in Redmi Note 4X?
Installation process SIM-The cards are simple, but there are a few nuances that will help avoid problems:
Turn off your phone (required!)| Remove the tray with a paper clip |Put the nano-SIM in slot 1 (main) |Put the second SIM or microSD in slot 2 (hybrid) |Give the tray carefully to click |Put the phone on and check the network-->
Pay attention to the following points:
- 🔋 Don't put it in. SIM-cards when the phone is turned on - this can lead to a failure of the communication module.
- 📏 The card size should be strictly nano-SIM (4FF). If you have a micro-SIM or mini-SIM, cut it off with an adapter or replace it in the cabin of the operator.
- 🔄 Slot order is important: slot 1 (The upper one is usually the main one and supports 4G, slot 2 (the lower one may only work in 2G/3G.
Once the cards are installed, the phone may need to restart to activate the network, unless one of the SIMs is identified:
- Check if the card is inserted correctly (contacts should be directed downwards).
- Reboot the phone.
- Try inserting the SIM into another slot.
- If the problem persists, the card may be damaged or incompatible with the phone (e.g., too old).
What to do if your phone can’t see SIM-map?
Set-up of two SIM-map
Once the cards are installed, you need to configure their work. 4X This is done through the Settings menu. → SIM-maps and mobile networks:
- 📞 Assign primary SIM call-in, SMS and mobile Internet.
- 🌐 Enable/disable mobile data for each card separately.
- 🔄 Activate switching between SIM charge-saving.
- 📵 Turn off one of them. SIM, if not used.
Important settings that should be paid attention to:
- Network priority: if one of the SIM only works 2G, Set it as the second and make it the main one. 4G-map.
- Data Switching: In the settings, you can prevent automatic switching to the second SIM if there is no network on the first one.
- SIM names: Assign convenient names to the cards (e.g., "Worker" and "Personal") to avoid confusion.
If you use two SIMs from different carriers, consider the following:
⚠️ Note: When an active Internet connection is on one SIM The second card can automatically disconnect from the network (especially in the mode). 4G). This is normal behavior, as most smartphones do not support simultaneous operation of two communication modules at high speeds.
To check which one SIM Active for the Internet, go to Settings → SIM-maps and mobile networks → Mobile Internet. You can manually select a map to transmit data.
Frequent problems and their solutions
Even with the right installation SIM-Map users of Redmi Note 4X Sometimes they have problems. Let's look at the most common ones:
| Problem. | Possible cause | Decision |
|---|---|---|
| The phone doesn't see one of the SIMs. | Incorrect installation, damaged card, software failure | Reinstall the card, check in another phone, update the firmware |
| No network on the second SIM | Slot 2 only supports 2G/3G, the operator does not support these standards. | Change the cards or contact the operator. |
| The phone overheats when two SIMs are running | Simultaneous operation of two communication modules increases the load | Turn off mobile internet on a second SIM or use one card |
| Mobile Internet is not working on one of the SIMs | Incorrect APN settings, operator restrictions | Set up an APN manually or contact the operator |
If after all the manipulations the problem is not solved, the communication module or antenna unit may be defective.In this case, it is recommended to contact the service center. The average cost of repairing the communication module for the Redmi Note 4X is from 1500 to 3000 rubles (2026).
Another common complaint is that the battery runs out quickly when using two SIMs, which is because the phone is constantly scanning the networks of two carriers to save power.
- 🔋 Turn off network search on the second SIM, if rarely used.
- 📵 Transfer the second card to mode Only 2G (If you don't need the internet).
- ⚡ Enable battery saving mode in the settings.
Comparison with other Xiaomi models
For clarity, compare the Redmi Note 4X with other popular Xiaomi models for SIM-card support:
| Model | SIM count | Support for microSD support | Slot type |
|---|---|---|---|
| Redmi Note 4X | 2 | Yeah (hybrid slot) | nano-SIM |
| Redmi Note 5 | 2 | Yeah (hybrid slot) | nano-SIM |
| Redmi Note 8 Pro | 2 | Yeah (separate slot) | nano-SIM |
| Poco X3 | 2 | Yeah (hybrid slot) | nano-SIM |
| Mi 11 | 2 | No. | nano-SIM |
As the table shows, the Redmi Note 4X doesn’t stand out from other models – the hybrid slot was the standard solution for Xiaomi’s budget smartphones until 2019.Only in newer models (starting with the Redmi Note 8 Pro) did three separate slots (two SIM + microSD) appear.
If you are critical to using two SIMs and a memory card at the same time, consider buying a newer model, such as:
- 📱 Redmi Note 10 – three slots, support 5G.
- 📱 Poco M4 Pro – separate slots for SIM microSD.
- 📱 Redmi Note 12 – improved communication module, support for eSIM in some versions.