Dual 4G Xiaomi: A Complete Guide to Technology and Setup

Have you ever noticed the Dual sign? 4G And they wondered what it meant in practice, and it became the standard for most of the brand's devices today, but its working principles and its real benefits remain a mystery to many users. SIM, where the emphasis is on the number of SIM cards, Dual 4G It solves a more complex problem – providing stable high-speed communication on both cards simultaneously.

In this article, we will discuss in detail how the Dual technology works. 4G Xiaomi smartphones, how it differs from alternative solutions (for example, the same as the other two, DSDS Dual VoLTE, or Dual VoLTE, and why it's important for users who are actively using two SIM cards.You'll also learn which Xiaomi, Redmi and other models are available. POCO They support this function, how to set it up properly, and what pitfalls can occur in operation, and we'll focus on the current challenges of 2026, from compatibility with operators to the impact on battery life.

What's Dual? 4G And how it works for Xiaomi.

Dual 4G (or dual 4G Standby is a technology that allows a smartphone to communicate at the same time 4G (LTE) both-in-waiting SIM-Unlike the classic Dual. SIM, where one card is running 2G/3G, while the second 4G, Here both SIM cards can stay on the network of the fourth generation without losing the speed of the Internet and the quality of calls.

Technically, this is achieved by having two independent modems (or one modem with Dual Rx support) in the smartphone that can simultaneously process signals from different operators. For example, the Xiaomi 13 Pro uses a Qualcomm Snapdragon 8 Gen 2 chip with hardware support for Dual. 4G VoLTE, which allows both SIM cards to receive calls in VoLTE format (voice via voice) 4G) without switching to outdated standards.

It is important to understand that Dual 4G It's not equal to Dual Active (both cards are running simultaneously in active mode). DSDS (Dual SIM Dual Standby, where both cards are in standby mode, but only one can be active at a particular time (for example, during a call, the second card is temporarily disabled). 4G Both SIM cards remain online 4G, Which makes it easier to switch between them.

• 📶 Advantages: High-speed Internet on both SIM cards, better call quality (VoLTE), fast transition between cards.
• ⚡ Disadvantages: Increased energy consumption (5-10% more than with one active energy consumption) SIM), Possible compatibility issues with some operators.
• 🔧 Requirements: Both SIM cards must support VoLTE, the smartphone must have hardware support Dual 4G.

Dual 4G vs Dual SIM Dual VoLTE: What's the difference?

Users often confuse Dual 4G I'm going to talk about the differences between two SIM cards:

In smartphones Xiaomi 2022-2026 most often implemented the scheme Dual 4G Dual VoLTE is supported, but without full Dual Active, which means you can take calls on both SIM cards in VoLTE format, but while talking on one card, the second card temporarily shuts down (for example, to save battery power). Full Dual Active is only found in flagship models such as Xiaomi 14 Ultra or Black Shark 5 Pro.

When choosing a smartphone, pay attention to the wording in the characteristics:

• 🔍 "Dual SIM, Dual Standby (DSDS)" — classic 4G-card.
• 🔍 "Dual 4G VoLTE - both cards in 4G, Support for VoLTE on both sides.
• 🔍 "Dual 5G" — similarly 4G, But for fifth generation networks (found in Xiaomi) 13T Pro, Redmi K60 Pro).

⚠️ Note: Some operators (for example, Tele2 in Russia) can block VoLTE on the second SIM card even with Dual support. 4G Before buying, check this information with your provider.

What Xiaomi smartphones support Dual 4G: full-length

Dual Technology 4G Available in all modern Xiaomi smartphones, starting with the models of 2019-2020.However, full support for Dual VoLTE (calls in the phone) 4G And then, on both maps, it came out later. Below is a list of devices that have confirmed Dual support. 4G 2026:

Flagship models (full support for Dual VoLTE) + 5G):

• 📱 Xiaomi 14 / 14 Pro / 14 Ultra
• 📱 Xiaomi 13 / 13 Pro / 13 Ultra / 13T / 13T Pro
• 📱 Xiaomi 12 / 12 Pro / 12S Ultra
• 📱 Black Shark 5 / 5 Pro / 5 RS

Mid-segment (Dual) 4G VoLTE, no. 5G second SIM):

• 📱 Redmi Note 12 Pro+ / Note 12 Pro / Note 12
• 📱 Redmi K60 / K60 Pro / K60E
• 📱 POCO F5 / F5 Pro / X5 Pro
• 📱 Xiaomi 11T / 11T Pro

Budget models (Dual) 4G No VoLTE on second SIM):

• 📱 Redmi Note 11 / Note 11 Pro / Note 11S
• 📱 POCO M5 / M5s / X4 GT
• 📱 Redmi 10 / 10A / 10C (Only in modifications with Snapdragon)

Check for Dual Support 4G In your model, follow the following steps:

1. Go to Settings. → The phone. → Full specifications.
2. Find the Network section or SIM-map.
3. Check for the presence of the Dual item 4G VoLTE or Dual Standby.

How to set up Dual 4G Xiaomi: step-by-step instructions

Even if your smartphone supports Dual 4G, By default, the function can be disabled. Let's look at how to activate and configure it for maximum performance.

Step 1: Checking the compatibility of SIM cards

Make sure that both SIM cards are:

• 📋 Supports VoLTE (check with the operator).
• 📋 Activated for service 4G/LTE (sometimes you need to send USSD-teams, for example, *111*46# for MTS).
• 📋 They are not virtual (eSIMs). + physical SIM They may not support Dual. 4G).

Step 2: Activate Dual 4G customized

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose the first one. SIM-map → Enable VoLTE and Enable 4G.
3. Repeat for the second. SIM-map.
4. Return to the main settings menu SIM-maps and find the Dual option 4G or use 4G both SIM (In some firmware it is hidden in Additional settings).

Step 3: Optimization of work

For stable Dual operation 4G recommended:

• 🔄 Disable automatic network selection (install only) 4G both-card).
• 📴 Enable Flight Mode for 30 seconds, then turn off (reset network settings).
• 🔋 To track battery consumption: in Settings → Battery → Battery use check if the modem consumes too much power.

⚠️ Attention: On some firmware MIUI (Especially the global versions of the Dual option 4G To unlock it, use the engineering menu: ##4636## → Phone information → Establish a preferred network type → LTE Do not change other options in the engineering menu without knowing the consequences!

Common problems with Dual 4G and their decisions

Despite the obvious advantages, Dual 4G It can cause failures. Let's look at the typical problems and how to fix them.

Problem 1: Second. SIM-card-less 4G Reason: Operator does not support VoLTE on the second card or smartphone automatically switches it to the second card 3G. Decision:

• 📞 Call the operator and request VoLTE activation.
• 🔧 Manually set the network mode Only 4G troublesome SIM.
• 🔄 Restart your phone or reset your network settings (Settings) → SIM-map → Resetting mobile network settings).

Problem 2: Fast battery discharge Cause: Two active 4G-The modems consume 15 to 20 percent more power:

• ⚡ Turn it off. 4G second SIM, If it is used only for calls (Settings) → SIM-map → Network mode → 3G).
• 🔋 Include the Adaptive Battery in Settings → Battery.
• 📴 Use the Power Saving Mode at Low Charge.

Problem 3: The connection disappears when switching between SIM Cause: Network confluence conflict or firmware error. Solution:

• 🔄 Update your smartphone to the latest version MIUI.
• 📥 Reset network settings (Settings) → System system → Resetting settings → Resetting Wi-Fi, Mobile Network and Bluetooth).
• 🛠️ If the problem persists, check your smartphone for hardware defects (such as poor contact). SIM-tray).

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After the update MIUI missing the Dual 4G, Try to roll back to the previous firmware version via Fastboot or contact the service center. Often bugs are fixed in the following patches.

Dual 4G and 5G: Is the technology compatible with Xiaomi?

With the advent of networks 5G Users are wondering if they can use Dual. 4G together 5G? Xiaomi smartphones have two approaches:

1. Dual 5G (full-fledged support)

In flagship models (for example, Xiaomi 13 Pro or Redmi) K60 Pro) Dual technology available 5G, where:

• 🌐 One. SIM-map works 5G, second 4G.
• 📞 VoNR calls (voice through voice) 5G) Supported on only one card.
• ⚡ Energy consumption is higher than Dual 4G, 25-30%.

Limitation:

5G

Dual 5G Active

Xiaomi

2. Hybrid mode (5G + 4G)

In most devices (for example, POCO F5 Pro) upon activation 5G first SIM the second automatically switches to 4G or 3G. This is done to save energy and prevent overheating of the modem.

In 2026, a full-fledged Dual will be completed. 5G (simultaneous operation of two cards in 5G) The prerogative of flagships from Samsung and Apple. Xiaomi has not yet announced such devices.

FAQ: Answers to Frequent Questions about Dual 4G Xiaomi

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Dual 4G Xiaomi is not a marketing trick, but a real technology that provides a stable and reliable service. 4G-linkage SIM-However, its effectiveness depends on the support of the operator, the model of the smartphone and the correct settings.