Xiaomi Redmi 4: How much? SIM-Does the card support the smartphone?

Xiaomi Redmi 4 — One of the most popular budget smartphones 2016-2017 It's still in use in many countries, but when you buy a used model or choose between modifications, you often get confused about how many of them are. SIM-Cards are supported by Redmi 4? The answer depends on the specific version of the device – they were released several, and each has its own characteristics.

In this article, we will discuss all the modifications of Redmi 4 (including Redmi). 4A, Redmi 4 Pro and Redmi 4 Prime, explain the principles of hybrid slots, show how to install correctly SIM-We'll answer some of the questions you're asking, if you're planning to use two. SIM-cards or combine them with a memory card – this guide will help to avoid errors.

We're going to focus on the hybrid slot, which is the one that raises the most questions, and many users mistakenly think they can use two at the same time. SIM-We'll also provide up-to-date data on compatibility with modern carriers (2026) and give you a guide on how to choose the format. SIM.

1. All modifications of Xiaomi Redmi 4: comparison by quantity SIM-map

The Redmi 4 range includes four main models, each of which has its own features in terms of support. SIM-It's important to understand that even similar devices can be radically different in terms of technical characteristics.

Let's look at each modification:

• 📱 Redmi 4 (standard version, mido) is the most common hybrid slot model. Supports 2 nano-SIM or 1 nano-SIM + 1 MicroSD.
• 📱 Redmi 4A (rolex: a simplified version with a separate microSD slot and 2 nano-SIM support at the same time.
• 📱 Redmi 4 Pro (markw) - improved version with metal body and hybrid slot (similar to the standard model).
• 📱 Redmi 4 Prime (prada) – top modification with hybrid slot, but with VoLTE support for both SIM-map.

The key difference is whether or not there is a hybrid slot. In hybrid slot models (Redmi 4, Redmi 4 Pro, Redmi 4 Prime), you will not be able to use two at the same time. SIM-The cards and the memory card. 4A There is no such limitation.

2. Hybrid slot in Redmi 4: How does it work?

Hybrid slot is a technical solution that allows you to use either a second slot. SIM-A card or a microSD card, but not both. 4A) The slot is executed as follows:

• 🔹 Slot 1 – Nano-SIM (main) only SIM-map).
• 🔹 Slot 2 – Hybrid: either nano-SIM or MicroSD (up to 256 GB).

This means that if you need two SIM-And if you install a microSD, you can't expand the memory of a smartphone. SIM-map will become unavailable.

⚠️ Note: When buying a used Redmi 4, check if the hybrid slot is MicroSD instead of the second one. SIM. Many sellers do not mention this nuance, and users then wonder why the second one does not work. SIM.

How do you know if you have a hybrid slot?

1. Take out the tray for SIM-cards (use a paper clip or special key).
2. Look at the label: if the tray is indicated SIM1 and SIM2/MicroSD, So, the slot is hybrid.
3. At Redmi. 4A The tray will have three separate nests: SIM1, SIM2 microSD.

3. Which ones? SIM-The cards are suitable for Redmi 4?

All Redmi 4 versions support only nano-SIM (smallest size) format. SIM-Older card (mini-SIM or micro-SIM) will have to be cut or replaced by the operator.

Important nuances:

• 📶 Support 4G: All right. SIM-Redmi 4 cards are available in the network 4G, VoLTE (voice calls through the phone) 4G) Supported only in Redmi 4 Prime and some Redmi 4 Pro firmware.
• 🔄 Switching SIM: In the settings, you can choose which SIM call-in, SMS and mobile Internet by default.
• 🌍 Roaming: When traveling abroad, it is recommended to use SIM1 — It's more stable for roaming.

If you are planning to use a smartphone with two SIM-In the cards, take into account the following limitations:

⚠️ Note: If you use two of these SIM-cards from different operators (for example, MTS and Tele2), check the settings APN. In some cases, mobile Internet may not work in a stable way on the second SIM due to profile conflict.

4. Step-by-step instruction: how to install SIM-map in Redmi 4

Installation SIM-Redmi 4 cards are a simple procedure, but there are a few nuances that will help you avoid errors:

1. Turn off the smartphone, although some users install it. SIM-cards on the enabled device, this can lead to failures in the operation of the communication module.
2. Find a slot for SIM-In Redmi 4, it's on the left end (if you look at the screen), put a paper clip in a small hole and press the tray to move out.
3. Place it. SIM-card(s) in the tray: 🔹 Nana SIM1 Nano-SIM is set with gold contacts down. 🔹 In a hybrid slot (SIM2/MicroSD) choose or SIM, microSD. 🔹 At Redmi. 4A MicroSD is installed in a separate socket on the tray.

Put the tray back in. Make sure it's firmly in the slots. If the tray isn't fixed, check if the cards are properly set.

Turn on your smartphone. Once you load the system, check if it's recognized. SIM-If one of the SIM not determined, try reinstall it or wipe the contacts with dry cloth.

After installation SIM-The card is not determined, try the following steps:

• 🔄 Reboot your smartphone.
• 🔧 Check the settings: go to Settings → SIM-Maps and mobile networks and select the desired SIM call-to-internet.
• 📶 Make sure that SIM-card activated by the operator.
• 🔨 If the problem persists, try another one. SIM-Card (possibly not valid current card).

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If you travel frequently, keep your settings in your notes. APN In Redmi 4, they are sometimes reset when switching between operators. SIM-map.

5. Can two be used? SIM-MicroSD cards and microSD cards simultaneously?

No, in the Redmi 4 models (except for the Redmi 4 models) 4A) It is not possible to use two at the same time. SIM-MicroSD cards and memory cards due to the hybrid slot, one of the main limitations of the device, which many users learn about after buying.

Here are the possible options:

• 📱 1 SIM + MicroSD: Perfect if you need to expand your memory (for example, for photos or music), but the second one is the best. SIM required.
• 📞 2 SIM MicroSD-free: Suitable for those who use two SIM-Cards (for example, for work and personal needs).
• 🔄 Interchange: You can periodically change the microSD to the second SIM, But it's uncomfortable.

If you are critically important, two SIM-cards, and additional memory, consider the following alternatives:

1. Cloud storage: Use Google Drive, Yandex Disk or Mi Cloud to back up your files.
2. OTG-The Redmi 4 supports the flash drive. OTG, You can connect external drives through an adapter.
3. Model replacement.If hybrid slot is critical, pay attention to Redmi 4A or newer Xiaomi models with a separate microSD slot (e.g. Redmi Note 5).

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A hybrid slot is a trade-off between compactness and functionality. Manufacturers often sacrifice convenience for a thin body.

6. Frequent problems with SIM-Redmi 4 cards and their solutions

Even after the correct installation SIM-Redmi 4 cards can have a variety of problems. Let's look at the most common cases and how to fix them.

6.1 The smartphone can't see SIM-map

If one or both SIM-The cards are not defined, follow the following steps:

1. Reinstall. SIM-The card (maybe it was inserted incorrectly).
2. Wipe your contacts. SIM-cards and slots with dry soft fabric (sometimes oxidation interferes with communication).
3. Try another one. SIM-card to rule out its malfunction.
4. Update the firmware: go to Settings → About Phone → System Update.
5. Reset network settings: Settings → SIM-maps and mobile networks → Resetting network settings.

6.2 The mobile Internet does not work on one of the SIM

This problem is often associated with incorrect settings. APN. To solve it:

1. Go to Settings. → SIM-maps and mobile networks → [choose SIM] → Access points (APN).
2. Remove all existing ones APN and add a new one by requesting settings from the operator (usually they come in the form of a new one). SMS).
3. Make sure that the correct mobile data is selected SIM: Settings → SIM-maps and mobile networks → Mobile data.

Calls are interrupted or poor quality of communication

If the connection is lost or the voice is interrupted during a conversation, try:

• 📶 Disable VoLTE (if enabled): Settings → SIM-maps and mobile networks → [choose SIM] → Use VoLTE.
• 🔄 Switch to switch to 3G instead 4G: Settings → SIM-maps and mobile networks → Preferred type of network → 3G.
• 🔧 Reset the network settings (see 6.1).

⚠️ Note: If the communication problem occurs only in the second SIM-card (in a hybrid slot), this may be a hardware malfunction.In such cases, it is recommended to contact the service center, as it may require a replacement slot.

7.Compatibility of Redmi 4 with modern operators (2026)

Although Redmi 4 was released in 2016, it still supports most modern communication standards, but there are a few nuances to consider when using with current carriers:

• 📡 4G (LTE): All Redmi 4 modifications support 4G, But not all bands. In Russia, for example, the smartphone is on frequencies. B1 (2100 MHz), B3 (1800 MHz), B7 (2600 MHz), which covers the main networks of MTS, Beeline, MegaFon and Tele2.
• 📞 VoLTE: Full support only in Redmi 4 Prime. In other models, VoLTE may not work stable or be available.
• 🌐 5G: Redmi 4 does not support fifth generation networks.
• 🔄 eSIM: This smartphone does not support electronic SIM-map.

If you plan to use Redmi 4 with modern tariffs (for example, Tele2’s All for Yours or MTS’s All! tariff), make sure that:

• 📌 Yours. SIM-card 4G (old-fashioned USIM may not be the right fit).
• 📌 In the network settings, the correct type of connection is selected (4G/3G/2G (motor-car)).
• 📌 APN set up according to the operator’s requirements (settings can be requested by SMS or on the operator's website).

To check compatibility with your operator, you can use the FrequencyCheck service, where you need to enter the smartphone model (Xiaomi Redmi 4) and the country.

8.Redmi 4 Alternatives: Which Xiaomi Smartphones Support 2 SIM + MicroSD?

If the hybrid slot in Redmi 4 does not suit you, pay attention to other Xiaomi models where you can use two at the same time. SIM-Here are some of the current options (including used and new devices):

If you are looking for a new smartphone with two support SIM and MicroSD, pay attention to the line of Redmi Note or POCO — In them, a separate slot for a memory card has become the standard.

When choosing a used device, check:

• 🔋 Battery status (at Redmi) 4 It often requires replacement after 3-4 years).
• 📶 Both jobs. SIM-Slots (especially hybrids).
• 🔧 The presence of origil firmware (castom firmware can disrupt the operation of the communication module).

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When buying a redmi 4, be sure to check it out. IMEI (type *#06# - it must match the data on the box and not be blacklisted.

FAQ: Frequent questions about SIM-Maps in Xiaomi Redmi 4