DSDS Xiaomi: what it is, how it works and why you need Dual mode SIM Dual Standby

If you have ever looked at the settings SIM-cards on the smartphone Xiaomi, then probably noticed the mysterious abbreviation DSDS. It appears next to the options for managing two SIM cards, but not all users understand what lies behind these four letters. Meanwhile, this mode directly affects how your phone works with multiple carriers – whether it will catch the network on both cards at the same time or have to choose a priority.

In this article, we will explain in detail what is DSDS (Dual SIM Dual Standby in the context of Xiaomi smartphones, how this mode differs from alternative solutions (e.g. Dual) SIM Dual Active, and why having it or not can dramatically change your experience with two SIM cards. DSDS on different models Xiaomi, Redmi and POCO, Avoid problems with missed calls or slow internet.

We pay special attention to the hidden nuances of work DSDS modern-day MIUI 14/15, And that's something that the manufacturer doesn't always advertise. 4G On one SIM card, the second can automatically switch to the 2G, If you use a smartphone with two SIMs, this information will save you time and nerves.

What is it? DSDS: decoding and working principle

DSDS (Dual SIM Dual Standby is a technology that allows a smartphone to work with two SIM-It's a card that's simultaneously, but with an important caveat: only one of them can be active in data mode (calls/internet) at a particular time:

• 🔄 Dual SIM — two-way SIM-map.
• 📶 Dual Standby – both cards are on standby (can receive calls), but only one is active for data transfer.

The key difference DSDS from the more advanced Dual SIM Dual Active (DSDA) is that in the DSDA Both SIM cards can transmit data at the same time (for example, call one at a time and receive a message). SMS The other way. DSDS If you make an active call on one SIM, the second person falls asleep temporarily and may miss the incoming call. This is a compromise solution that saves energy and simplifies the hardware of the smartphone.

In Xiaomi smartphones (including Redmi and POCO) DSDS implemented at the firmware level MIUI. The algorithm of the work looks like this:

1. Both SIM-Cards are registered online and can receive calls/SMS.
2. With active use of the Internet (4G/5G) On one sim, the second goes into a mode of limited activity (most often 2G).
3. During a call on one SIM, the second is temporarily disconnected from the network (missed calls go to voice mail).

DSDS vs DSDA vs eSIM: Technology comparison

Understand the advantages and limitations DSDS, Compare it to alternative solutions for two SIM-Below is a table of key differences:

The main disadvantage DSDS — You can't use the mobile Internet and call different SIMs at the same time, for example, if you download a file from the same location. 4G The first SIM, the second one, the call, it can be missed or forwarded to voicemail. DSDA This is not a problem, but these smartphones are more expensive and consume more energy.

As for eSIM, Xiaomi has implemented this technology on the principle of DSDS: virtual and physical SIM-The cards are "one active, one waiting" with the exception of the flagship models with support for Dual. 5G, where both sims can work simultaneously in new generation networks.

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If it is critical for you to take calls on both SIMs without passes, consider buying a smartphone with support. DSDA (for example, Xiaomi 13T pro POCO F5 Pro).

Where to find settings DSDS Xiaomi, Redmi and POCO

Management of the regime DSDS Xiaomi smartphones are hidden in the settings SIM-The path may vary slightly depending on the version. MIUI, But the general pattern is as follows:

1. Open the Settings app.
2. Go to section. SIM-Maps and mobile networks (or two) SIM-Maps and mobile network in new versions).
3. Select the option of Double Settings SIM or Double-Share. SIM.
4. Here you'll see the option. DSDS or dual SIM Dual Standby (in some firmwares it may be called both) SIM-card-activated).

The screen will display the current mode status and available setting options. MIUI 14 for the Redmi Note 12 Pro+ The interface looks like this:

• 📱 Slot 1: [Operator Name], Status 4G.
• 📱 Slot 2: [Name of operator], status 2G/3G (if the first SIM is active).
• ⚙️ Mode of work: DSDS (default).

In some models (for example, POCO X5 Pro) Priority option available SIM-A data map where you can choose which SIM will be used for the Internet by default, which is useful if one card has unlimited rates and the other one has limited traffic.

Select a section "SIM-maps and mobile networks"|Make sure both of you SIM-cards recognized by the system|Check the current mode (DSDS or DSDA)|Set your priorities. SIM-data card (if necessary)|Reboot your smartphone to apply changes-->

How to set up correctly DSDS steady-work

Even if your Xiaomi smartphone supports you DSDS, Incorrect settings can lead to missed calls, slow internet or fast battery drain:

1. Priority selection SIM-data-card

By default. MIUI Uses the first SIM card (Slot 1) to transfer mobile data. If you have unlimited rates on the second SIM, change priority:

Settings → SIM- Maps and Mobile Networks → Priority SIM- Data Map → Slot 2

2. setting up a preferred network type

If one of the SIM cards is working on the network 2G, This can slow the switching between them:

• 🌐 For the main SIM: 4G (preferably 5G (if maintained).
• 📞 For the second SIMKY: 3G (Compromise between speed and stability of calls).

This will help to avoid a situation when the active Internet on one SIM the second completely falls off the network.

3. Turning off automatic switching

In some firmware MIUI There's an option called Automatic Data Switching, which can cause unexpected connection breaks:

Settings → SIM-maps and mobile networks → Automatic data switch → Turn off

It is also worth considering that in the mode DSDS VoLTE calls (voice via voice) 4G) This can be unstable if the operator does not support this function for two SIM cards at the same time, in which case it is recommended to disable VoLTE for one of the SIMs:

Settings → SIM- Maps and Mobile Networks → [Select SIM] → Use VoLTE → Turn off

Common problems with DSDS and their decisions

Despite the convenience, the regime DSDS These are the most common problems and the ways to fix them:

1 Missed calls to second SIM-map

Reason: During an active Internet connection on the first SIM, the second switches to low power mode and may not have time to “wake up” to receive a call.

Decision:

• 🔧 Set a priority for the second SIM. 3G instead 2G (network-type).
• 📞 Enable call forwarding to the first SIM: 21[number one] SIM]# (service paid, specify the tariff from the operator).
• 🔄 Reboot your smartphone – sometimes it resets the “hung” state of the communication module.

2. slow Internet with active second SIM-map

Reason: With two Sims simultaneously active, the smartphone can limit bandwidth to save energy.

Decision:

• ⚡ Turn off background data transfer for the second SIM: Settings → Annexes → Data management → Background data → Limit for Slot 2.
• 🌐 Manually select the network Only 4G for the main SIM (turn off automatic selection).
• 🔋 Check if the power saving mode is activated – it may limit the operation of the communication module.

3.The smartphone doesn't see the second SIM-map MIUI

Reason: Sometimes, after updating the firmware, the settings of the communication module are reset or conflicts arise with the operator.

Decision:

• 🔄 Take it out and put it back in. SIM-card (pre-turning off the smartphone).
• 📲 Reset network settings: Settings → SIM-maps and mobile networks → Resetting network settings.
• 🔧 If the problem persists, try manually selecting the operator for the second SIM: Settings → SIM-map → [Choose. SIM] → Network operators → Manual search.

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If after all the manipulations the second SIM-The card is still undetectable, check it on another phone, maybe the problem is in the card itself (chip damaged) or in the slot of the smartphone (contact springs contaminated).

Another rare but possible problem is conflict. IMEI. If you have recently flashed your smartphone or restored it from a backup, IMEI You could have dropped him:

*#06#

If Null or Unknown is displayed instead of the number, you will need to restore it. IMEI using the engineering menu or contact the service center.

DSDS In the new models of Xiaomi: what has changed in the MIUI 14/15

With the exit. MIUI 14 and MIUI 15 Xiaomi has made several changes to the work of the regime DSDS, And there's a lot of talk about it:

1. Dynamic switching of networks

The smartphone will automatically switch the second SIM-map 2G, If the first person is actively using the Internet 4G/5G. This saves battery power, but it can cause delays in receiving calls to turn off this behavior:

Settings → SIM- Maps and Mobile Networks → Additional → Energy Optimization → Disable

2. Dual support 5G mode DSDS

In flagship models (Xiaomi) 13/14 series, Redmi K60 Pro has been given the opportunity to use 5G both SIM-maps, but with a limitation: only one SIM can be active in the 5G For example, if you download a file from 5G on the first SIM, the second will automatically switch to 4G or 3G.

3. Improved compatibility with VoLTE and VoNR

V MIUI 15 added support for VoNR (voice calls via voice) 5G) for DSDS, But only if the operator supports this function:

Settings → SIM- Maps and Mobile Networks → [Select SIM] → Use VoNR

If you don’t have an option, your carrier or smartphone model doesn’t support this technology.

4. New options for eSIM

In eSIM-enabled models (such as the Xiaomi 14), you can now flexibly prioritize between physical and virtual. SIM-For example, assign eSIM to the main data, and the physical to the call.

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If, after updating, MIUI 15 you've lost your settings DSDS, Try resetting your network settings: Settings → The phone. → Resetting settings → Reset the network settings, which will bring back the standard two-sims settings.

Tips for saving battery power when using DSDS

Working with two SIM-map-to-card DSDS It increases the load on the communication module, which can reduce battery life by 10 to 15 percent:

1. Turn off background activity for the second SIM-map

Many apps (messaging, email) are constantly polling the network on both SIMs.

Settings → Applications → Data Management → Background data → Limit for Slot 2

2. Use the "Only" mode 3G" second SIM-map

If the second SIM is only for calls, set it for:

Settings → SIM- Maps and Mobile Networks → [Select SIM] → Preferred Network Type → 3G

This will reduce power consumption, as the module will not constantly scan the network. 4G/5G.

3. Set up a schedule for mobile data

V MIUI You can use a time limit for mobile traffic, like you can turn off the Internet on a second SIM at night:

→ SIM-maps and mobile networks → Data Transfer → Schedule

4. disable automatic network search

By default, the smartphone is constantly scanning the available networks, which consumes the charge.

Settings → SIM- Maps and Mobile Networks → Additional → Automatic Network Selection → Turn off

It is also worth keeping an eye on the temperature of the smartphone if it overheats (for example, during games or charging), MIUI may be forced to shut down the second SIM-The cooling card of the module, which will help:

• 🧊 Removal of the cover during intensive use.
• 🔋 Turning off fast charging (if the temperature exceeds 40)°C).

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The most effective way to save charge when using DSDS — disconnect 4G/5G second SIM-If you only need it for calls, it will reduce battery consumption. 5–10% by reducing the load on the communication module.

FAQ: Frequent questions about DSDS Xiaomi