Owners of the Xiaomi Redmi 4 smartphone often overlook one of the classic features - built-in FM-In the era of streaming services and podcasts, having a physical radio module seems an anachronism, but for many users it is the ability to listen to news, music and transcripts of matches without the expense of mobile traffic. FM-radio on this device requires several specific conditions, without which the module simply will not work.
The main challenge that beginners face is the lack of a built-in speaker to play the signal in some configurations or software locks without a connected headset. Redmi 4 is based on Qualcomm processors, which traditionally support this feature at the hardware level, but the MIUI software shell can behave differently depending on the firmware version. You need to understand that the standard Radio application is not just a player, but controls a physical chip that requires an external antenna.
In this guide, we will go into detail the entire process, from preparing the hardware to fine-tuning frequencies and eliminating common errors. We will look at why station search does not work, how to improve reception quality in low signal conditions and what alternative methods exist if the standard software does not start. Proper antenna tuning and understanding the principles of the module will help you get stable sound even in moving vehicles.
Hardware requirements and device preparation
The first and most critical condition of work FM-The module on Xiaomi Redmi 4 is a wired headset. Unlike modern flagships, where antennas are built into the body, in the budget and mid-range segment to which this model belongs, the role of the antenna is performed by the headphone wire. Without a physical connection of the 3.5 mm connector, it will not be possible to start the receiver, since the circuit for trapping radio waves remains open.
The quality of reception depends on the length and condition of the headset wire. The optimal cable length is from 1 to 1.5 meters, which corresponds to the standard length of most complete headphones. If you use adapters such as USB-C to 3.5 mm or Micro-USB to 3.5 mm (depending on the specific modification of the Redmi 4, although the classic version is the standard connector), make sure that they support analog audio signal transmission, not just digital data.
⚠️ Note: Using cheap adapters without shielding can lead to heavy noise and cracking in the air, as the wire will catch tips from the processor and communication module.
Also worth checking the technical condition of the socket. In Redmi 4, the headphone jack is combined with the headset microphone, and oxidation of the contacts or dust can disrupt the antenna circuit. Before you start setting up, wipe the headphone plug with dry cloth and make sure it is inserted before the characteristic click.If you plan to listen to the radio through Bluetooth headphones, then the regular app will not work, since the Bluetooth protocol does not support the transmission of raw materials. FM-tuner.
Installation and launch of a standard application
In most of the global and Chinese MIUI firmware installed on Redmi 4, the Radio app is already built into the system toolkit. It's usually in the Tools folder on the desktop. The icon is an image of an old transistor receiver. If you don't find it, it may have been removed by the user earlier or hidden in Hidden Apps mode.
To run, you need to open the app and allow access to the microphone and phone if you request permission. Immediately after opening, you will see the interface with the on button and frequency scale. If the headset is connected correctly, you will automatically search for available stations in your area. The scanning process can take from 30 seconds to 2 minutes depending on the number of frequencies available.
In some cases, especially on custom builds or trimmed versions MIUI, In this situation, the system will suggest downloading it from the GetApps store or Google Play. Be careful when choosing third-party software: many applications in the store are only Internet radio aggregators and do not know how to work with hardware. FM-You need the ones that require earbuds to work.
Manual frequency setting and station search
After a successful launch, the frequency range adjustment phase begins. By default, Xiaomi Redmi 4 is set to a 50 kHz or 100 kHz grid pitch, which is the standard for Europe and the CIS. However, if you are in a region with a different frequency grid (for example, in some countries in the Americas, a step can be 200 kHz), automatic search can skip stations or find them with severe distortions.
To manually adjust, you need to go to the app settings menu (usually three dots or a gear in the corner), where you can choose a region manually or run a forced scan. During the search, the application consistently checks each frequency in the range of 87.5 MHz - 108.0 MHz. The stations found are marked with green marks on the scale.
If the automatic search fails, use manual adjustment. By pressing the arrows up or down, change the frequency with minimal pitch. If you have a strong signal, you will hear a characteristic noise, changing to sound. To lock the station, click Add to Favorites or Save. This will create a shortcut for quick access in the future without re-search.
- 📻 Autosearch: Rapid scanning of the entire range while keeping the signals found above a certain threshold.
- 🎚️ Manual setting: Accurate frequency adjustment in 0.05 MHz increments for catching weak or noisy stations.
- 📡 Signal amplification: In settings, you can activate the antenna amplification mode, which is useful in areas of uncertain reception.
- 💾 Preservation: Ability to assign a name and logo to a station (RDS), If the textual information is transmitted.
Table of the main setting parameters
For the convenience of users who want to optimize the operation of the receiver, below is a table with the main parameters that affect the sound quality and stability of the work. FM-Understanding these parameters will help to avoid typical configuration errors.
| Parameter | Recommended value | Impact on work |
|---|---|---|
| Frequency step | 50 kHz/100 kHz | Determines the accuracy of the wave setting |
| Antenna mode | Auto/Included | Activates signal amplification through the wire |
| Recording format | MP3 / AAC | Affects the file size when recording ether |
| RDS data | Included. | Displays station name and track |
It's important to note that the recording format parameter is only relevant if you plan to record transcriptions from the ether. MP3 It takes up less space but may have a slightly lower quality compared to AAC, though hearing through standard headphones the frequency difference FM-range is almost invisible.
Addressing problems with sound quality and noise
One of the frequent complaints users have is the presence of background hissing, cracking or periodic dips of sound. Primarily this is due to physical interference. Xiaomi Redmi 4 has a plastic body, which is good for the radio signal, but internal tips from a running screen or 4G/LTE module can create interference. Try to turn off mobile data or Wi-Fi to check if the noise disappears.
The second reason could be poor contact in the connector or the use of poor-quality cable, if the headphone wire is twisted or has bends, its effectiveness as an antenna decreases, straighten the cable to the maximum, and it is worth checking whether the plug is wearing conductive cases that can close the contacts.
⚠️ Warning: If you hear a whistling or high-frequency squeak, it may indicate a tip from the charger.Do not use the radio while charging from cheap power supplies.
On the software side, it's worth trying to reset the radio application settings. Sometimes accumulated errors in the frequency grid cache cause noise reduction algorithms to malfunction. Restarting a phone with an already connected headset also often helps to reinitialize the audio chip drivers.
☑️ Diagnostics of Sound Problems
Ether recording and background work
The regular app on Redmi 4 allows you to not only listen to, but also record transcriptions, a feature that is useful for saving news releases or rare music compositions. To start recording, just press the corresponding button in the interface. Files are stored in internal memory in the FM Radio or Sound Recorder folder.
An important aspect is the background, you can fold the app and use other smartphone features like texting, web pages, or playing games, but if the system decides to save battery power, it can kill the radio process. To avoid this, you can either lock the app into memory or add it to the power saving exception list.
To set up your energy savings, go to Settings → Battery → Energy Saving. Search in the Radio list and select No Limits mode, which ensures that the background process is not stopped by the memory cleanup system and the broadcast does not stop suddenly.
Alternative applications and solutions
If a standard MIUI app doesn’t suit you or doesn’t work properly, the market offers a number of alternatives. However, as mentioned earlier, most apps on Google Play are Internet aggregators. You need applications that use a Qualcomm FM chip. An example is NextRadio (although support is discontinued, older versions work) or Spirit2 (requires root rights).
For advanced users with superuser rights (Root), deep tuner sensitivity and regional codes are available, which are hidden in the stock firmware. Modified versions of the Radio system application can be found on specialized forums dedicated to Xiaomi.
When installing third-party software, be sure to check permissions. the application should not require access to contacts or SMS work-in FM-Excessive permission requests are a sure sign that you are not a specialized tool, but a potentially malicious software.