How to connect a second call to Xiaomi: all ways + error solving

Why you need a second call and how it works for Xiaomi

The second call (or hold/wait) feature allows you to receive an incoming call without interrupting an ongoing conversation, which is indispensable for business negotiations when you can not miss an important contact, or in everyday situations - for example, when a child calls while you are talking to a colleague. On Xiaomi smartphones (including Redmi and POCO), this feature works through Call Waiting (waiting for a call) and Call Hold (holding).

However, many users are faced with a problem: the option is either disabled by default or does not work due to operator settings or MIUI firmware. In this article, we will discuss all the ways to activate the second call, from standard settings to hidden codes and manually editing network settings, and you will learn why the feature may not work on your model (for example, Redmi Note 12 or Xiaomi 13T) and how to fix it.

Important: The possibilities of the second call depend on three factors:

• 📱 Smartphone model – on budget Redmi (for example, Redmi) A2) There may be no hardware support.
• 📶 Communications operator - MTS, Beeline, Tele2 and MegaFon differently implement the service "Waiting for a call".
• 🔧 Version. MIUI — firmware MIUI 14+ The path to settings has changed.

Method 1: Standard activation via phone settings

The easiest method is to enable the function through the MIUI menu. It works on most modern models (Xiaomi 13/14, Redmi Note 11/12, POCO X5 and later).

1. Open the phone application (pipe icon).
2. Click on the three dots in the upper right corner → select Settings.
3. Go to the Calls section → Additional settings.
4. Find the Call Waiting and activate the slider.
5. Save the changes and restart the phone.

If the call waiting item is not on the menu, it means:

• 🔄 Your operator does not support the service (check in your personal account or through the service). USSD-team).
• 📵 You have custom firmware installed (like LineageOS) where the function is disabled.
• 🛠️ The phone activated mode Flight or disabled SIM-map.

Method 2: USSD-activation commands from the operator

If in the settings MIUI No Waiting for a Call option, it can be turned on through secret USSD-Each operator uses its own commands:

Once you enter the command, you will receive an SMS with activation confirmation. If the service is paid (for example, Tele2 has 3 rubles / day), the operator will charge the subscription fee. On some tariffs (for example, All for 300 from MTS), the waiting for the call is turned on by default, but hidden in the phone settings.

⚠️ Note: If, after activation, through USSD The second call is not working, check if the application blocks the security in the MIUI. Go to Settings. → Annexes → Permits → Autostart and enable autostart for Phone and SIM card.

Method 3: Manually enable through engineering menu

On older models (Redmi 4X, Xiaomi Mi A1) or custom firmware, standard methods may not work, and the Engineering Mode will help. Careful: the wrong actions here can disrupt the network!

Instructions:

1. Open the phone app and enter the code: ##4636##
2. Select Phone Information (Phone Information).
3. Scroll down to the Set preferred network type block.
4. Click on Turn on radio (if the button is active).
5. Go back to the main menu of the engineering mode and select Call Settings.
6. Activate Call Waiting and Call Hold.

If the second call does not work after this action:

• 🔧 Try resetting your network settings: Settings → SIM-maps and mobile networks → Resetting network settings.
• 📡 Check if yours is supported. SIM-VoLTE card (voice via voice) 4G) — Without it, waiting for a call may not work properly.

Method 4: Configure via the application "SIM cards and mobile networks"

V MIUI 13/14 The way to set up the second call has changed. Now the option can be hidden in the menu. SIM-To find her:

1. Go to Settings → SIM-cards and mobile networks.
2. Choose yours. SIM-card (if two of them).
3. Click on Additional Settings (or Operator Services).
4. Find Waiting for a Call or Holding a Call.

If the option is not available, but the operator has confirmed the activation of the service, try resetting the APN settings:

1. Same menu. SIM-Maps and mobile networks select Access Points (APN).
2. Click on three points → Reset to default values.
3. Reboot the phone.

⚠️ Note: On some models (POCO F3, Redmi K50) post-discharge APN The Internet is gone. To restore it, you'll have to manually enter the parameters. APN Your operator (you can find them on the official website).

Problem Solving: Why the Second Challenge Doesn't Work

If you have completed all the steps but the function is still not working, check these points:

Another common problem is application conflict, where some programs (like Truecaller or WhatsApp Business) can block incoming calls, to check this out:

1. Go to Settings → Applications → Application Management.
2. Find the phone and check if there are no locks in the list of "Last interactions".
3. Turn off Battery Optimization for the Phone app.

💡

If the second call is needed all the time, add the Phone widget to the home screen, which will speed up access to hold/wait during the call.

Features of setting up on popular Xiaomi models

MIUI firmware on different devices may differ, and here are some nuances for popular models:

• 📱 Xiaomi 13/14 Pro: The function only works when VoLTE is active. Without it, the second call will be reset.
• 📱 Redmi Note 10/11/12: On some firmware, the option is hidden - use USSD-team.
• 📱 POCO X3/X4/X5: You may need to activate manually through the engineering menu.
• 📱 Redmi A1/A2: Call waiting is not supported on Helio's budget chips A22.

On Xiaomi with duality SIM-cards (for example, Xiaomi) 12T) The second challenge will only work on the main SIM-card (slot 1) to change priority:

1. Go to Settings → SIM-cards and mobile networks.
2. Select Control. SIM-map.
3. Click on Voice Calls and change priority to SIM-2.

💡

On models with a Qualcomm processor (for example, Xiaomi 11T), the second call is more stable than on MediaTek (Redmi 9A).

FAQ: Frequent questions about second Xiaomi call