Modern smartphones such as Xiaomi Redmi 9AWhile many TVs have decent-quality screens, their diagonal size is often insufficient for watching movies with the whole family or displaying photos. Fortunately, wireless data transfer technologies make it easy to stream images from a mobile device to a large TV screen without wires. This is especially convenient when you need to show a presentation, play a video from a browser, or simply play a mobile game at maximum resolution.
Connection process Redmi 9A Casting to a TV via Wi-Fi is based on the Miracast and Chromecast standards, which are built into the MIUI interface. You don't need a smart TV with Android TV support, although it makes the process much easier. Owners of regular TVs can also use this feature if their device supports Wi-Fi Direct or has a suitable receiver. The main thing is to ensure a stable connection and the correct network settings.
In this article, we'll take a detailed look at all available screen sharing methods, covering both native system tools and third-party apps. You'll learn how to avoid image lag, fix audio desync, and what to do if your TV isn't detecting your phone. We'll also touch on the technical nuances of data transfer protocols within the ecosystem. Android.
⚠️ Note: Operating system and Smart TV interfaces may vary depending on the firmware version and device model. If you can't find the option described, try searching in the settings menu or refer to your TV manufacturer's documentation.
Technical requirements and equipment preparation
Before you begin setup, you need to make sure your equipment meets the minimum technical requirements. Redmi 9A It runs on Android 10 with MIUI 12, providing full functionality for wireless media streaming. However, the success of the operation depends not only on the phone but also on the capabilities of the receiving device—the TV.
Both devices must be on the same local network. This means that both the smartphone and TV must be connected to the same router. If you have a dual-band router, make sure both devices are connected to either the 2.4 GHz or 5 GHz network. Mixing bands sometimes results in devices not being able to see each other, despite formally being connected to the same access point.
- 📱 Smartphone Xiaomi Redmi 9A with the Wi-Fi module enabled and the operating system running.
- 📺 A TV with Smart TV support, Wi-Fi Direct, or a connected TV set-top box (Android Box, Apple TV).
- 📡 A stable home Wi-Fi network with internet access (for initial setup and some applications).
- 🔋 Make sure your devices' batteries are at least 20% charged, as the broadcast process may consume energy.
It's worth noting that an active internet connection is not required for the "Cast" feature to work after setup if you're using the Miracast protocol. However, for initial device detection and streaming services (YouTube, Netflix) to work, internet access is required. Check that "Guest Network" mode isn't enabled on your router, as it often isolates devices from each other.
Using the built-in "Cast" feature in MIUI
The easiest and fastest way to display an image with Redmi 9A To cast to a TV screen, use the built-in system function. In MIUI, it's called "Cast." This method doesn't require installing any additional software and is activated through the control panel or settings.
To launch, swipe down from the top of the notification shade and find the "Cast" icon. If it's not visible, swipe left or tap the edit button (usually a pencil or three dots) to add the widget to the panel. Once activated, the system will begin searching for available devices on the network.
You also need to activate the signal reception function on your TV screen. In the Smart TV menu, this may be called "Screen Share," "Mirroring," "Screen Casting," or "Wireless Display." Once the TV enters standby mode, your model name will appear in the list on your smartphone.
☑️ Check before connection
When connecting, a confirmation request may appear on the TV screen. Use your remote to confirm. Image The entire content from your phone will be copied to the big screen. While you can control the content from your phone in broadcast mode, the battery will drain faster due to the active display and Wi-Fi module.
Broadcast via YouTube app and streaming services
If you're watching videos from YouTube, Netflix, or other media services, using full screen mirroring (copying the entire display) isn't always optimal. It puts unnecessary strain on the processor. Redmi 9A and can cause slowdowns. It's much more efficient to use the built-in protocol. Chromecast.
Open the YouTube app on your smartphone and make sure you're signed in to the same Google account as your TV (if it's an Android Smart TV) or are on the same network. A rectangle icon with Wi-Fi waves will appear at the top of the app interface, next to your profile or in the corner of the video player.
Click this icon and select your TV from the list. The video will start playing directly on the TV, using its internet connection and decoder, while your phone acts as a remote control. This allows you to pause the video, change the volume, or even turn off the phone's screen without interrupting playback.
Why does the video lag when broadcasting?
If you're watching YouTube streaming and the video is constantly buffering, the problem may not be with your phone. Try lowering the video quality in your TV's player settings or rebooting your router, as the data stream is sent directly over the network.
The advantage of this method is that it doesn't put a strain on your smartphone. You can answer calls, chat on messengers, or play games while watching a movie on your TV. The picture quality in this mode is often higher than with simple mirroring, as the TV decodes the video stream at its full resolution.
Connecting to regular TVs without Smart TV
Owners of TVs without a built-in Wi-Fi module or Smart functions can also display an image from Redmi 9A, but this requires additional equipment. A standard phone Wi-Fi module can't transmit a signal directly to an old TV's display without an intermediate decoder.
The most popular solution is to use HDMI adapters, such as the Google Chromecast, Xiaomi Mi Stick, or similar Android-based set-top boxes. These devices plug into the TV's HDMI port, connect to Wi-Fi, and transform any TV with an HDMI input into a fully-fledged smart center.
| Device | Connection type | MIUI support | Peculiarities |
|---|---|---|---|
| Google Chromecast | HDMI + USB | Full (Chromecast built-in) | Ideal for YouTube and Netflix |
| Xiaomi Mi Stick | HDMI + USB | Native (MIUI for TV) | Better integration with Redmi |
| AnyCast / Miracast | HDMI + USB | Via the "Broadcast" function | A budget-friendly mirroring solution |
| Smart TV Box | HDMI | Full (Android TV) | Turns your TV into a powerful computer |
After connecting the adapter to the HDMI port and a power source, switch the TV to the signal source mode (Source or Input) to the appropriate port. The setup process then follows the same algorithm as for Smart TV: connecting to Wi-Fi and selecting the device in the phone menu.
⚠️ Note: Cheap Chinese streaming adapters (often sold as "Wireless Display Dongles") can introduce a 2-3 second image lag. This makes them unsuitable for fast-paced gaming, but perfectly suitable for viewing photos and videos.
Setting up third-party apps for streaming
Built-in tools don't always work correctly with all TV models, especially those with specific brands or older software versions. In such cases, specialized apps from the Google Play Store, which use alternative compression and video streaming algorithms, come to the rescue.
One of the most reliable solutions is the application Web Video Caster or TV Cast for Smart TVThey allow you to stream not only videos from the built-in player but also web page content, making them convenient for watching online cinemas that don't have an official TV app. Installation is standard via an app store.
After launching the app, you'll need to grant permission to access your local network and microphone (for audio streaming, if needed). The program will automatically scan your network and find compatible devices. Unlike system streaming, you can select specific content rather than mirroring the entire screen.
For users who need to broadcast game or desktop screens to devices that do not natively support Miracast, the app ApowerMirrorIt requires installing the client part on the TV (if it's an Android TV) or using the TV's built-in browser to navigate to the IP address.
Solutions to common problems and errors
Despite the simplicity of the technology, users Redmi 9A may encounter a number of difficulties. The most common issue is that the TV doesn't appear in the list of available devices. In 90% of cases, this is due to the devices being on different subnets (for example, one connected to guest Wi-Fi and the other to the main Wi-Fi) or client isolation being enabled on the router.
The second common issue is audio and video desynchronization. This often occurs when the Wi-Fi channel is overloaded by neighboring networks. In this case, it's recommended to change the broadcast channel in the router settings to a less congested one or switch to the 5 GHz frequency if both devices support it.
- 🔄 Restart your router, phone, and TV—this solves most temporary software glitches.
- 🛡️ Check your antivirus or firewall settings on your phone, as they may be blocking local connections.
- 📶 Make sure your TV's software is up to date, as older versions may not support the new WPA3 security protocols.
- 🔋 On the Redmi 9A, enable "Keep screen on" mode in the developer settings during long broadcasts to prevent the system from disconnecting and save power.
If the image is choppy or has low resolution, check your internet connection speed. Streaming Full HD content requires a stable speed of at least 15-20 Mbps. Also, make sure your phone isn't overheating, as Redmi 9A under active load, the processor may throttle (reduce frequency).
Frequently Asked Questions (FAQ)
Is it possible to connect Redmi 9A to a TV without internet?
Yes, it's possible. Miracast (Wi-Fi Direct) technology creates a direct connection between your phone and TV, bypassing the router and internet. However, initial setup of Smart TV and some apps may require network access.
Why does my phone battery drain quickly when I broadcast my screen?
Broadcast mode actively uses the Wi-Fi module, the video encoding processor, and keeps the screen on. These are the three most power-hungry components. It's recommended to keep your phone charged during long sessions.
Does Redmi 9A support Bluetooth audio streaming to TV?
Bluetooth itself isn't used to transmit the screen video stream. Audio is transmitted along with the video stream via Wi-Fi. Bluetooth can only be used to connect wireless headphones or speakers to the phone itself.
How do I remove black bars on the sides of my screen while streaming?
Black bars appear due to the different aspect ratios of your phone and TV screens. In the casting settings (if your TV has this option), try changing the display mode to "Full Screen" or "16:9," but this may result in cropped edges of the image.