Smartphones are no longer just voice communication tools, becoming powerful tools for business and remote work. Android device owners, particularly users of the Xiaomi ecosystem, often face the need to organize a group discussion without a laptop at hand. The built-in capabilities of the MIUI shell make it easy to connect subscribers into a single network, but this feature is not always obvious to beginners.
Unlike popular messengers, which require an Internet connection and an account for all participants, a classic conference call works over a standard cellular network. This is critical in situations where the interlocutors have a weak Wi-Fi signal or run out of traffic. The technology allows you to connect up to five or more people in one conversation, turning your Xiaomi into a full-fledged office communication center.
Before you start setting up, you need to make sure your plan supports Conference Communication. Most major carriers have this option enabled by default, but some tariffs may require separate activation. In this article, we will detail how to create a conference on an Android smartphone, what nuances are in different versions of the firmware and how to solve typical audio problems.
Technical requirements and preparation of SIM-card
The foundation for a successful group call is a stable cellular network and the right SIM card settings. The technology behind these conversations is called Conference Call, and is based on GSM or VoLTE standards. For your Xiaomi to work properly, you need the operator to support Call Hold, because it is the logic behind adding new interlocutors.
If you're planning to have important business negotiations, it's best to temporarily disable the second SIM card or redirect all incoming ones to it. When a second incoming call arrives during a conference, the system can automatically put the current conversation on hold or break the connection, a technical limitation of 2G/3G/4G networks that has not yet been completely eliminated.
It is also worth checking whether your number has activated the outbound ban or parental control service, which can block complex connection scenarios, and it is recommended to conduct a test run with a friend before an important call to make sure the sound is clean and there is no echo. Network settings should be set to “preferably” mode 4G/LTE» To ensure the highest quality of the voice channel.
- 📱 Make sure there is money on the room balance to make calls.
- 📶 Check the signal level at the conference venue (minimum) 2-3 division).
- 🔋 Charge the battery of the smartphone to a minimum 40-50%, Long conversations quickly put down the battery.
- 🔇 Disable third-party apps that may use the microphone (dictator, voice assistants).
Algorithm of creating a conference through a standard dialer
The MIUI interface may vary slightly depending on the Android version and regional firmware (Global, China, EEA), but the basic logic of the action remains the same. The process of adding members is built in a sequential manner: you can't select five contacts and press one button, you need to add them one at a time during a conversation.
First, dial the first person's number and wait for the connection. After the person answers, the call control panel will appear on the screen. This is where you need to find the Add Call button (a plus person icon or a + sign), and pressing this button automatically puts the first person in standby mode (Hold), and you will hear dialing beeps.
Dial the number of the other person. Once they answer, the unification button will appear again on the screen, which will now be called "Combine" or have an icon of two arrows converging into one. By pressing this, you will connect both subscribers to the same line. To add a third, fourth and subsequent participants, the procedure repeats: the Add Call button -> dial -> the "Combine" button.
☑️ Checklist of successful call
Usually the limit is 3 to 5 people at a time, and if you try to add a sixth, the system may give you an error or simply not connect the call, and all the participants hear each other, creating the effect of being in the same room.
Managing Participants and Managing Conversations
When the conference is already underway, the organizer (the one who initiated the group) has enhanced management capabilities. In the Xiaomi interface, when an active group call displays a list of all the connected numbers. By clicking on a specific number or icon next to it, you can see the available actions.
One of the most useful features is that you can talk to an individual participant without interrupting the general conference, and you can select a subscriber from the list and click on "Private Call," at which point the other participants stay on the line but don't hear your dialogue, which is convenient if you want to clarify the details without distracting the whole group.
⚠️ Note: If you put the phone down (complete the call) from your device, the conference will be completely torn up for all participants. To get out of the conversation, leaving others to communicate, you need to use the “Call Transfer” function (if supported by the operator) or simply not to complete the connection, but to leave the phone in standby mode.
You can also exclude individual participants from the conversation, and to do this, you need to select an unnecessary person in the active connection list and click the "Finish" button or the icon of the cross tube located opposite the number, the other participants will continue to communicate without interrupting the communication, which makes the moderation of the conversation completely controlled.
Use of third-party applications for enhanced capabilities
Android is good for quick decisions, but regular professional calls often require more advanced tools. Apps like Google Meet, Zoom or specialized dialers from the Play Market offer features not available in a standard call: video, screen demo, chat and recording conversation.
However, if you want voice over a cellular network (not the Internet), you can use conference apps that use callback technology. You create a room in the app, you specify the number of participants, and the system itself calls everyone, connecting them to one line, which takes the load off the Xiaomi battery and saves traffic if it is limited.
When installing third-party applications for calling in MIUI, you need to carefully consider permissions. Xiaomi security system can block access to the microphone or contacts, considering the application suspicious. You need to manually go to the application settings and allow Autostart, Background Operation and phone access, otherwise the call may be interrupted when the screen is turned off.
| Function | Standard call. | Apps (Zoom, WhatsApp) | Special services (Callback) |
|---|---|---|---|
| Sound quality | Depends on the operator (HD Voice) | Depends on the speed of the Internet | High (telephone network) |
| Traffic consumption | Tariff minutes | Mobile Internet/Wi-Fi | Tariff minutes |
| Number of participants | Usually 5. | Up to 100 and over | Up to 50-100. |
| Video link | No. | There is. | Rarely. |
Engineer's Secret Menu
Solving common problems and errors
Despite the technology, Xiaomi users may have trouble creating conferencing, and one of the common mistakes is “Calls failed to merge” – often because the first call was not properly held, or the carrier does not support simultaneous maintenance of two channels in your current location (for example, at the coverage boundary).
Another problem is echoing or robotic voice, which is often the case with a bad 4G signal, when the phone tries to switch to 3G/2G in the middle of a conversation, and then manually switching the smartphone to 3G Only or 4G Only mode through an engineering menu or network settings to lock in a stable communication channel.
⚠️ Note: If you use a Bluetooth headset, make sure it supports a profile HSP/HFP Cheap models can only transmit sound from one person or create a high latency, making dialogue impossible.
If the Add Call button is inactive (gray), check if you have incoming call forwarding active. The conflict between forwarding and call retention is a classic reason for blocking network-level conferencing. Turn off redirection in call settings and try again.
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Use a noise-cancelling headset. When you're in a conference room, the microphone on your smartphone on the table collects all the noises in the room, which is very disturbing, and the headphones isolate your voice and make your speech clearer.
MIUI settings to improve communication quality
The MIUI shell contains hidden settings that can affect voice quality. First of all, check the "Sound Improvement" or "Mi Sound" section in the settings. Although these features are multimedia-focused, some audio processing algorithms may conflict with telephony codecs.
It is also important to set up notifications so that incoming messages from messengers do not interrupt an important conversation with an audible signal.Enable Do Not Disturb mode or a special "Meeting" mode, which can be activated on a schedule, this will prevent vibration and light notifications that can distract during a serious conversation.
For advanced users, you can reset the network to factory settings, and it won't delete your contacts, but it will update the operator's network profile. → The phone. → All specs → Status SIM-map → Resetting settings LTE (This helps if the phone is stuck on an old tower with a bad signal.
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Conferencing stability is 90% dependent on the quality of the carrier’s coverage in your location, not the model of your smartphone, and if the problem is repeated, changing carriers may be more effective than buying a new phone.
Alternative scenarios for using group calls
Group calls are not just good for business, they're used by families to organize holidays, by friends to share music (via a speaker) or to discuss plans in real time, and unlike instant messengers, you don't have to wait for text to answer, you can do it in a voice-over instant.
Some users create “closed clubs” for interests, where the moderator calls with participants, who in turn can ask questions. Although the functionality is poorer than Discord, the ease of connection (just a phone number) makes this method available to older people who do not want to understand complex accounts.
It's important to remember that the pricing is important. If you're an organizer, you pay for minutes of conversation with each participant separately (or according to your tariff terms). Participants also pay for incoming/outgoing according to their rates. In the age of unlimited packages, this is rarely a problem, but when traveling abroad (roaming), the bills can be hefty.