How to change SIM-dispatcher SMS On smartphones Xiaomi: step-by-step instructions

Replacement SIM-dispatcher SMS Xiaomi can be used in different situations on smartphones, from a banal change of operator to solving problems with the delivery of messages. Despite the seeming simplicity of the process, users often face non-obvious nuances - especially if we are talking about two things. SIM-Cards, virtual operators or specific settings MIUI. In this article, we will discuss all possible scenarios: from physical replacement of the SIM to software setting the priority of sending. SMS.

It is important to understand that the procedure differs depending on the Xiaomi model (e.g. Redmi Note 12 and Xiaomi). POCO X5 Pro have different slots location, firmware versions (in MIUI 14 and HyperOS settings menus are different) and even type SIM-We will take all of these factors into account to make the instruction universal. If you have not previously encountered such settings, do not worry: the steps are illustrated in detail and supplemented with tips for eliminating typical errors.

When a change is required SIM-card SMS

It is not always obvious that the problem with sending messages is associated with the wrong one. SIM-Here are the key signs that it's time to change the settings:

• 📱 Messages go off the other SIM-cards than you chose (for example, with a work card instead of a personal one).
• ⚠️ There is an error "failed to send" SMS" active-network.
• 🔄 After the physical replacement SIM-Message cards continue to be sent from the old number.
• 📶 The lock screen displays a notification "SIM-card does not support SMS".
• 🔒 In the case of two SIM-Message cards are duplicated or sent accidentally.

Replacement may also be required in technical cases:

• 🔧 After updating the firmware, the default settings were lost (relevant to transitions from MIUI 13 on HyperOS).
• 📱 When activating eSIM and needing to reassign SMS physical SIM-map.
• 🔄 After resetting the settings to factory parameters.

⚠️ Note: If you use Google Messages or third-party messengers (such as Textra), settings SIM-card SMS They may conflict with the system, so first check the parameters in the application.

Preparation for replacement: what to do in advance

Before you change SIM-map SMS, Follow several mandatory steps to avoid data loss or disruptions:

Backup your contacts and messages through Settings → Google → Backup|Check the balance on both SIM-Cards (with a lack of funds) SMS never leave)|Make sure the new one is SIM-card activated by the operator|Turn off the "In the plane" and "Saving charge" modes"|Write it down. PUK-codes SIM-cards (in case of blocking)-->

Pay particular attention to the following points:

• 📶 Network Check: Make sure that the new SIM-The card catches the network in your area. To do this, make it temporarily the main one for calls (Settings) → SIM-maps and mobile networks → Choice SIM-call-card).
• 🔧 Compatibility: Some Xiaomi models (e.g. Mi 11 Ultra) do not support shipping SMS eSIM - only with physical SIM-Make sure you specify this in your model specifications.
• 📱 Bi-band SIM-Cards: If you use them SIM-support-card 5G (For example, from MTS or Beeline, make sure that the network settings are enabled mode "5G/4G/3G/2G", not 4G.

If you're moving in with one SIM-The same operator may need to transfer the number to another card (for example, change the tariff), in which case contact the operator support in advance - the process can take up to 24 hours.

Once a year.|Only when changing operators|Never changed.|When buying a new phone|Other-->

Step-by-step instructions: how to change SIM-map SMS

The process differs depending on the amount SIM-We'll look at both the single-sim and the two-simplified versions.

Scenario 1: One SIM-card (or eSIM)

If only one physical device is installed on the phone SIM-card or eSIM, the procedure is as simple as possible:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose the only available SIM-map (it will be marked as "SIM 1" or "eSIM").
3. Tap on the "Type" item SIM-card SMS" (version MIUI It's called "SMS default").
4. Confirm your choice – now all messages will be sent from this card.

Scenario 2: Two SIM-map

For devices with two physical SIM-The Redmi Note 13 Pro+ or POCO F5) algorithm:

1. Open the Settings. → SIM-maps and mobile networks.
2. Select the option "SIM-card settings for SMS" (in HyperOS it can be in the submenu "Additional").
3. The system will tell you to choose between SIM 1 and SIM 2.
4. Confirm the choice with the "Ready" button.

If the item "SIM-card settings for SMS" is missing, this means that:

• 📱 You have firmware installed without dual-SIM support (relevant for some regional versions of Xiaomi).
• 🔧 There's only one activated on the phone. SIM-map (check in Settings) → The phone. → Status. SIM-map).
• 📶 The operator has blocked the possibility of sending SMS one-way SIM-maps (for example, if it is data-only) SIM).

Features for models with eSIM

On devices with eSIM support (for example, Xiaomi 13T Pro or Xiaomi Mix Fold 3), the process has nuances:

1. If eSIM is used for data and physical SIM is used for calls, SMS will be sent from a physical card by default.
2. To reassign. SMS on eSIM, go to Settings → SIM-maps and mobile networks → eSIM and select it as your primary message.
3. Some carriers (e.g. Tele2) do not support sending SMS with eSIM – check this out in advance.

Table: Compatibility of Xiaomi models with SMS settings

If your model is not in the table, check its specifications on the official Xiaomi website or in the Mi Community app. 10A) choice SIM-card SMS It is not available, the system automatically uses the same SIM, what.

Typical errors and their solutions

Even after you set it up properly, users have problems, and let's look at the most common ones.

• 🚫 Mistake "SMS Not sent: Check the balance on SIM-card - some operators block the shipment at zero balance. → Annexes → Communications → Permits included rights to SMS. Restart your phone – sometimes the center SMS-"hangs".
• 🔄 SMS go off with the wrong one SIM-Maps: Check the settings in the SMS-App (e.g. Google Messages Selection) SIM-Maps can be duplicated. Reset network settings: Settings → SIM-maps and mobile networks → Resetting. If you use MIUI 12 or older, update the firmware – older versions had a priority bug SIM.
• 📵 No choice. SIM for SMS: Set up an alternative. SMS-messenger (e.g. messenger, QKSMS), choice SIM Implemented at the application level. Check if the second one is activated. SIM-map in Settings → SIM-If the phone is locked by the operator, it may be disabled at the firmware level.

⚠️ Note: If after replacement SIM-The cards stopped coming. SMS from banks or services (such as confirmation codes), check if your number is linked to the old one. SIM-Some banks (e.g. Sberbank or Tinkoff) require re-assignment of the number when changing SIM.

Additional settings for stable operation of SMS

To avoid problems with sending messages in the future, set the following settings:

• 📶 Network Mode: Go to Settings → SIM-maps and mobile networks → Name of the access point (APN) Make sure that your operator is correct. APN. For MTS it is Internet.mts.ru, for Beeline - Internet.beeline.ru, for MegaFon - Internet.
• 🔔 Notifications: Enable delivery alerts SMS: Settings → Notifications → Communications → Delivery report.
• 🔒 Security: Disable the shipment SMS Short numbers (operator services) in Settings → SIM-maps and mobile networks → Lockdown SMS, if you don't use them.
• 📱 Synchronization: Activate backup SMS In Settings → Google → Backup → Communications.

If you travel frequently, pay attention to your roaming settings:

• 🌍 Enable "Roaming Data" and "SMS roaming for both SIM-map.
• 💰 Clarify the rates SMS roaming with your operator – sometimes they are much higher than on calls.
• 📶 For stable operation in roaming, it is recommended to use SIM-VoLTE-enabled card (voices via voice) 4G).

💡

If you send often SMS To international numbers, install Textra or Pulse SMS — They let you choose. SIM-card for each message separately, and also support delayed sending.

What to do if nothing helps

If after all the manipulations SMS They are not going to go or go with the wrong person. SIM-Maps, try the following radical measures:

1. Resetting network settings: Settings → SIM-maps and mobile networks → Resetting mobile network settings This will return to factory parameters all settings associated with the SIM-Maps and network, but will not affect personal data.
2. Cleaning the Messages app cache: Settings → Applications → Application Management → Messages → Storage → Clear the cache
3. Phone flashing: If the problem occurred after the MIUI update, try rolling back to the previous firmware version via Settings → About Phone → System Update → Three Points → Select the Service Pack.
4. Contacting the service center: In rare cases, the problem may be related to a hardware malfunction of the module. SIM-This is true if the phone doesn't recognize any of the cards. SIM-cards or constantly resets settings.

If you suspect that the problem is on the operator’s side, follow the following steps:

• 📞 Call the operator’s hotline and ask to check your status SIM-map.
• 🔄 Ask me to re-release. SIM-Sometimes old cards lose support SMS.
• 📄 Check if your number is blocked for spam (relevant if you send a lot of stuff) SMS short-numbered).

⚠️ Note: Some Xiaomi models (e.g. Redmi) 9A or POCO M3) after resetting the settings to the factory parameters, the choice SIM-card SMS It's reset, but the menu item disappears, and then you can only use the firmware on Fastboot or the service.

FAQ: Frequent questions about replacing SIM-card for SMS on Xiaomi