How to make Xiaomi smartphone the main default: setting up calls, SMS and applications

If you use a few of them SIM-cards or devices (such as a tablet and phone), the system may misidentify a priority device for calls, messages or even notifications. MIUI HyperOS is solved through default settings – but not all users know where to look for the desired settings.

Especially relevant problem for owners of dual smartphones (with two). SIM-Those who connect Xiaomi to other gadgets through Mi Account or Google account, for example, if you use the Redmi Note 12 as your primary phone, but the default system redirects calls to your old phone, that's a inconvenience. In this article, we will analyze all the ways to make Xiaomi the main device in different scenarios: from calls to applications.

1. Set up Xiaomi phone as the main one for calls and SMS

The most common request is to make Xiaomi a priority device for outgoing and incoming calls, as well as SMS. This is especially important if you have:

• 📱 Two. SIM-cards in one phone (e.g. Poco) X5 Pro with slots for nano-SIM + nano-SIM).
• 🔄 Multiple devices on the same number (via Call Forwarding or Mi Cloud).
• 📞 Problems with defining the main SIM When calling (the system asks for a choice every time).

To set up the main SIM-call-card SMS:

1. Open the phone application (pipe icon).
2. Press three points (⋮) top-right → Settings.
3. Select Settings SIM-maps (or Management) SIM-mapping).
4. Put it on the right foot. SIM-map and activate options: 📞 Use for default calls 💬 Use it for SMS default 🌐 Use for mobile data (optional)

On some models (e.g. Xiaomi) 13T) These settings may be in the Settings section. → SIM-maps and mobile networks → If you don't have any options, upgrade to the latest version. MIUI or hyperos.

Update the firmware to the latest version

Make sure that SIM-card active (no block from operator)

Reboot your phone after the changes

Check the balance on SIM-Cards (some operators are important)

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2.How to make Xiaomi the primary notification device

If you have multiple Xiaomi gadgets (like a phone + Pad 6 tablet), the system can duplicate notifications or send them to the wrong device.

Method 1: Mi Account (if the devices are synchronized):

1. Open Settings → Accounts and Sync → Mi Account.
2. Select Device Management.
3. Find your phone on the list and tap it.
4. Activate the option Primary Notification Device (or Priority Device).

Method 2: Through Google Account (for Android notifications):

1. Go to Settings → Google → Manage your Google account.
2. Select the Security tab → Your devices.
3. Find your Xiaomi and click Manage → Enable notifications.

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If notifications still arrive on the old device, clear the cache of the Google Play Services app in the app settings.

3. Set up Xiaomi as the main one for applications (WhatsApp, Telegram, etc.)

Some messengers (such as WhatsApp or Telegram) allow you to choose the main device to receive messages, which is true if you use one account on multiple devices.

For WhatsApp:

• 📱 Open the app on Xiaomi.
• Tap it on three points (⋮) → Related devices.
• Make sure your phone is marked as the Primary Device (if not, untie other gadgets).

For Telegram:

• 🔄 Go to Settings. → Devices.
• Find your Xiaomi in the list and click Make Primary (if the option is available).
• 🚫 Remove old sessions from other devices if they interfere.

Critical Feature: In MIUI 15 and HyperOS, some apps (such as Mi Home) automatically identify the main device by linking to the Mi Account. If you changed your phone but notifications come to the old one, check your Settings → Account account.

4.Synchronization of contacts and data by default

To make Xiaomi the primary store for contacts, calendar, and notes, set up sync:

Method 1: Through Mi Cloud:

1. Open Settings → Accounts and Sync → Mi Account.
2. Activate the sliders for: 📇 Contacts 📅 Calendar 📝 Notes 📷 Gallery (optional)

Synchronize

Method 2: Through a Google Account:

1. Go to Settings → Accounts and Sync → Google.
2. Select your account and enable synchronization for the data you need.

5. Problems and errors in setting up the main device

Sometimes users encounter bugs when Xiaomi does not save the default settings.

⚠️ Warning: If after restarting the phone again asks which one SIM Use it for calls, reset your network settings. Go to Settings for that. → SIM-maps and mobile networks → Resetting network settings.

Mistake 1: "It is not possible to establish" SIM-default-card"

• 🔄 Reboot the phone.
• 📶 Check if it's active. SIM-Card (possibly operator lock).
• 🔧 Update. MIUI last-minute.

Error 2: Notifications are coming to the old device

• 🔗 Untie the old device in the Mi Account → Device management.
• 📱 Remove the cache of the Google Play Services app.
• 🔄 Reconnect your Google account on your new phone.

Mistake 3: WhatsApp doesn't see new phone as its mainstay

• 📲 Remove the application and install it again.
• 🔐 Confirm the number through SMS (not through a call).
• 🚫 Untie Old Devices on WhatsApp Web.

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If the problem persists after all manipulations, reset the network settings (Settings) → Memory. → Resetting settings → Reset network settings. This will remove stored Wi-Fi and Bluetooth, but will solve most conflicts with the Internet. SIM-map.

6. Additional settings for advanced users

If standard methods do not help, you can use hidden settings Xiaomi or ADB-commands for forced change of main device.

Method 1: Engineering menu (for experienced users)

Enter the phone code in the application:

##4636##

Go to Phone Information and check the Preferred network type settings. If it doesn't show the correct value, change it to LTE/4G (for modern networks).

Method 2: ADB (PC required)

Connect Xiaomi to your computer, turn on USB Debugging (Settings → About Phone → MIUI Version → 7 times tap on version) and execute the command:

adb shell settings put global multi_sim_vibration_enabled 1

This command forces vibration to be activated for the main SIM, which indirectly helps the system determine priority.

⚠️ Attention: Use ADB And the engineering menu can cause your phone to malfunction. Do this only if you're confident in your actions and have previously backed up!

7. Frequent Questions (FAQ)