Modern smartphones like the Xiaomi Redmi 9T are often used in dual active SIM mode, allowing you to separate work and personal calls. However, standard MIUI shell settings offer a single ringtone for both lines by default, which creates confusion in critical situations.
Fortunately, Android, coupled with Xiaomi’s signature add-ons, provides flexible tools to personalize audiovisual notifications, so you can assign unique ringtones to each SIM card separately, and set specific calls to specific subscribers from the contact book, making the smartphone a smart incoming filter, allowing you to respond only to really important calls.
In this guide, we will take a closer look at all the ways you can customize your sound on Redmi 9T. We will look at the standard methods through the system menu, the intricacies of working with contacts and possible problems with file formats. Understanding these nuances will allow you to fully control the sound space of your device.
Basic setting of ringtones through the system menu
The first step to personalization is accessing the basic settings of the device’s audio profile. Unlike some other manufacturers, Xiaomi integrates SIM management directly into the general settings menu, rather than hiding it in deep sub-items. You need to open the Settings app and find the section responsible for sounds and vibrations.
Here you'll see switches to select the ringtone for the call, and the system will tell you to choose which SIM card you want to change the settings for, a fundamental step that newcomers often miss when they install the same composition on both lines of communication, and to separate the call streams, you need to act sequentially for each card.
The algorithm of actions in the main menu is as follows:
- 📱 Go to the Sound and Vibration section in the main system settings.
- 🔊 Select the Melody of the Call item, where the list of available SIM cards will be displayed.
- 🎵 Click on the desired SIM card (SIM 1 SIM 2) and select a track from the list or download your file.
⚠️ Note: If you don’t see your music files in the list, make sure they’re saved to the Ringtones folder or Sounds in internal memory, rather than just lying in downloads.
Once you select a track, the system will immediately apply the changes, but remember that the standard set of tunes in MIUI is quite limited. To fully customize, you will most likely need to download your own audio files. It is important that the file formats are compatible with the device, otherwise the phone will simply ignore them when you try to install them.
Set unique sounds for specific contacts
The most effective way to tell who is calling without looking at the screen is to assign individual tunes to important subscribers. On Xiaomi Redmi 9T, this feature works independently of the SIM card you choose, and if you set a personal sound for a contact, it will play back in priority, overriding the overall SIM card settings.
To do this, you need to have a number saved in your phone book, and the logic is simple: you check the settings of the particular contact, then the settings of the SIM card that the call came through, and then the overall system ringtone at the end, so contact personalization is the most accurate filtering tool.
The process of customizing the individual sound looks like this:
- 📞 Open the Phone or Contacts app and find the right subscriber.
- 👤 Click on the contact name to go to his card, then select the Change button (usually the pencil icon).
- 🎼 Find the Call Melody field (may be hidden under the “More” button or be at the bottom of the list) and select a unique track.
It's important to note that in some versions of MIUI, when you choose a contact melody, the system can ask which SIM card to use if the contact is tied to a particular number, and if the contact is not tied to a single line, the sound will work universally for anyone who enters from that person.
Working with files and audio formats
The quality of playback and the ability to install the track directly depend on the format of the audio file. Xiaomi Redmi 9T, like most Android smartphones, natively supports MP3, M4A, OGG and WAV formats. Problems most often arise not with the format itself, but with bitrate or secure files from streaming services.
Files downloaded from instant messengers or browsers can have DRM limitations or be packaged into archives. Before you try to install a track, check its playback through a standard player. If the file does not play in the player, it will not become a ringtone. The best choice is a classic MP3 with a bitrate of 128 to 320 kbit / s.
For easy file management, use the built-in Explorer:
- 📂 Open the Explorer app and go to the Audio or Music section.
- ✂️ Cut the track if necessary, as too long intros can be annoying.
- 📁 Move ready files to the Ringtones folder for quick access in settings.
⚠️ Note: High resolution files (Hi-Res, FLAC) may not appear in the call melodies selection list due to the system ringtone maker limitations MIUI. Convert them into MP3.
The length of the track is worth paying special attention. Android system restrictions often cut ringtones longer than 30-40 seconds, or the playback cycle can get lost. It is recommended to use special ringtone-maker applications or online services to create short, but recognizable snippets of compositions.
Use of themes and store themes MIUI
Redmi 9T owners have access to a powerful customization tool, the Theme app, which is not just a way to change icons, but also a legal source of free and paid ringtones optimized specifically for Xiaomi devices, and unlike downloaded files from the Internet, these tracks are guaranteed to be compatible with the system.
Within the Themes app, there's a separate category dedicated to sounds, and you can find ringtones, notifications and alarms, and you can set them up in a single click, and the tracks are automatically integrated into the system, and you can find them in the SIM card melody selection menu.
The procedure in the store topics:
- Launch the Themes app on the main screen.
- In the bottom navigation bar, select the Sound tab (or enter a query in search).
- Find your favorite pack or track and click Download and then Apply.
The advantage of this method is that you can download whole sets of sounds that create a single audio atmosphere, and the themes are updated frequently, and you can always find something fresh, but remember that you need an active Internet connection and a Mi Account to download the content.
Comparison of Call Configuring Methods
After looking at all the ways, it's helpful to organize the information to choose the best option for your needs. Each method has its advantages and disadvantages depending on how deeply you want to personalize the device. Below is a comparative table of the main approaches.
| Method | Difficulty | Flexibility | Impact on the battery |
|---|---|---|---|
| System menu | Low. | Medium (SIM only) | No. |
| Contact setting | Medium | Tall (individually) | No. |
| Third-party annexes | Tall. | Maximum | Minimum |
| Tham's shop | Low. | Medium (packages) | No. |
As you can see from the table, for most users, a combination of system settings and contact personalization is enough, and using third-party apps is only justified if you need automatic change of tunes on a schedule or geolocation, which is beyond the basic functionality of the Redmi 9T.
The choice of method also depends on your technical proficiency: Manual file management gives you complete control, but takes time to prepare tracks, Theme Store is the path of least resistance, offering ready-made solutions out of the box.
Solving Frequent Sound Problems
Even when set up correctly, users may encounter situations where the melody is not playing or playing the wrong tune. Often the problem lies in the "Do Not Disturb" mode or in the priority of the alarm clock. On Xiaomi, these settings can overlap, creating the illusion of a malfunction.
Check if the silent mode is activated for a particular SIM card. In the SIM card management settings, you can completely turn off the sound for one of them, leaving the second active. This is a useful feature, but if it is turned on accidentally, you will miss calls.
Checklist for diagnosis of sound problems:
☑️ Diagnostics of sound
⚠️ Warning: If after setting a new tune, the phone emits a standard horn, try restarting the device. MIUI Sometimes you need to update the changes.
And there's also a conflict with Bluetooth devices, which is that if you have wireless headphones or speakers connected, the sound of a call can go through them even if you're not using them at the moment, and turning off Bluetooth helps you quickly determine if that's the cause of the missing sound.