Owners of budget but functional smartphones often face the desire to broadcast content from a small screen to a large diagonal of the TV. Xiaomi Redmi 9A, despite its affordable price, is equipped with all the necessary set of technologies for organizing multimedia bundle with modern technology. However, the lack of some ports and the specifics of the MIUI operating system can raise questions among users accustomed to more expensive flagships.
There are several proven ways to connect, each with its own advantages and limitations, depending on what kind of TV you have, whether you have a wire on hand, and how important the stability of the signal is, and in this article we will discuss in detail the technical details of the connection, so you can choose the best option for watching photos, videos or games.
Wireless connection via built-in translator
The easiest and fastest way to display an image is to use the wireless connectivity built into the MIUI shell, which is based on Miracast technology, which is supported by most modern Smart TVs. You don't need additional cables or complex router settings to get started, just so that both devices are on the same Wi-Fi network.
To activate the function, lower the notification curtain down and find the Broadcast icon. If it is not available in quick access, go to the Settings menu → Connection and Sharing → Broadcast. Once turned on, the smartphone will start searching for available devices within range. On the TV screen, you may need to confirm the connection, which is carried out using the remote control.
Note that wireless connectivity is sensitive to interference. If the router is running in congested 2.4 GHz, image delays or audio desynchronization are possible. For comfortable viewing of movies, you should use a 5 GHz network if your router supports dual-band mode.
The quality of the picture in the wireless connection depends on the signal power and the load of the channel. Input lag can be noticeable in games, so this method is less suitable for gaming than for viewing static content.
⚠️ Attention: With long-term wireless broadcast smartphone Redmi 9A It can be heated in the processor area. It is recommended to remove the protective case for better heat removal.
Use of Chromecast technology and applications
If your TV doesn’t support native Miracast, but has built-in support for Google Chromecast or the YouTube app on Smart TV, you can use an alternative method. On Xiaomi smartphones, this feature is often integrated into system applications, but for reliability, it’s better to use the official Google service.
To stream from Chrome or YouTube, just click on the characteristic rectangle icon with waves in the corner of the screen. The list of available devices will be updated, and after selecting your TV, the content will play on the big screen. Unlike the full screen broadcast (Screen Mirroring), here only the video stream is transmitted, which reduces the load on the phone processor.
The advantage of this method is stability, and even if you fold an app or lock your smartphone screen, you can't interrupt your TV playback, which is especially useful when listening to music or watching long lectures.
Why can't you see the YouTube button?
There are third-party apps from the Google Play store that extend the functionality of the broadcast, allowing you to transfer files of specific formats or use the phone as a remote, but the built-in Android system tools often work more stable and do not require the installation of additional software.
Connection via HDMI cable and adapter
The wired connection guarantees maximum image quality and no delays, which is critical for games or presentations. However, this is an important technical nuance of the Redmi 9A. This smartphone is equipped with a Micro-USB 2.0 port that does not support video transmission directly through standard OTG adapters.
To implement a wired connection, you will need a special adapter that connects not through the charging port, but uses other interfaces, or requires support for MHL (Mobile High-Definition Link), which is often absent in Xiaomi budget models. If the specifications of your MHL phone revision are not stated, the usual Micro-USB to HDMI adapters will not work.
Alternatively, wireless devices can be used. HDMI-Adapters (such as AnyCast or Miracast-dongles) that are inserted into the port of the TV.The smartphone connects to such a dongle via Wi-Fi Direct, creating a stable data channel without the involvement of the router.
☑️ Compatibility check for HDMI
| Connection method | Image quality | Signal delay | Battery consumption |
|---|---|---|---|
| Wi-Fi (Miracast) | High (up to 1080p) | Medium/High | Very tall. |
| Chromecast | High (network dependent) | Low. | Medium. |
| HDMI (adapter) | Maximum. | Absent. | Charging is coming. |
| DLNA | Depends on the file. | Low. | Low. |
If you do find a dedicated adapter that works with your device, the picture quality will match the resolution of the TV screen. However, for the Redmi 9A with its 720p screen, zooming to 4K TV may not look ideal due to software interpolation.
Broadcasting over DLNA and Local Area Network
Technology DLNA It allows you to stream media files (photos, videos, music) over a local network without duplicating the screen, which is ideal if you want to show a family album or run a downloaded movie in high bitrate. DLNA/UPnP.
On the smartphone side, you can use the built-in gallery or video player Mi Video. When playing a file, click on the menu button and select Translate or the device icon. The phone will find the TV on the network and start transmitting the data stream.
The main difference from Miracast is that the phone acts only as a remote control, video processing is done by the TV, so the battery is consumed minimally, and the phone can be used for other tasks in the background.
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To transfer large files without compression, use the DLNA method. It provides original image quality, unlike on-screen translators, which can stream.
In some cases, third-party software is required, such as BubbleUPnP or AllConnect, which provide more flexible codec and subtitle settings that may not be supported by standard system tools.
Configure permission and frequency of update
When connecting to an external display, it is important to properly configure output settings. Xiaomi Redmi 9A automatically detects the capabilities of the TV, but sometimes manual adjustments are required. You can access these settings through the Settings menu → Connection and Sharing → Broadcast → Settings (cog button).
You can select the output resolution here. If the TV is old and doesn't support HD, a forced resolution reduction to 480p can solve the black screen problem, and you can also adjust the image orientation and save the proportions.
The screen refresh rate is usually fixed at 60 Hz. Attempts to set other values can lead to unstable operation or complete absence of a signal.
⚠️ Note: Change the system resolution settings through the engineering menu or ADB-commands without understanding the consequences can lead to inoperability of the interface.
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Automatic settings work 95% of the time, and manual intervention is required only when there are specific compatibility issues with older TV models.
Addressing problems and delays
The most common problem with wireless connectivity is desynchronizing audio and video, and if the actors' lips on the screen are not moving in the right rhythm, try to reduce the quality of the stream in the broadcast settings or reboot the router, and disconnecting the extra devices from the Wi-Fi network also helps.
If the TV can't see the phone, check the firewall settings on the router. Sometimes Wi-Fi security features block direct connection between devices within the LAN. Make sure the "AP Isolation" option is turned off.
If the image is twitching or low resolution, check the driver version and update the Google Play Services app. The relevance of system components is critical to the operation of media transfer protocols.