Wireless display on Xiaomi Redmi 9: a complete guide to setup and use

Xiaomi’s wireless display technology allows you to broadcast your phone screen to a large screen without wires — whether it’s a TV, monitor or projector. Redmi 9 owners often face questions like “How does it work?”, “What devices are supported?” and “Why is the image slowing down?” In this article, we will examine all the nuances from basic principles to fine-tuning and solving typical problems.

Redmi 9

Wi-Fi Display

Miracast

If you've never used wireless broadcasting, start by checking the compatibility of your TV or monitor. TV Samsung, LG or Xiaomi (Mi series) TV) It is also important to note that Redmi 9 does not support Google Cast (as on Chromecast), so for broadcasting on devices like Nexus Player or Google. TV You'll need workarounds.

What is a wireless display and how it works on Redmi 9

Wireless Display (or Wi-Fi Display) is a technology that allows you to duplicate or expand the screen of a smartphone to an external device through the air. In the case of Redmi 9, the Miracast protocol is used, which works through Wi-Fi Direct, a direct communication channel between the phone and the receiver without the need for a router, which distinguishes it from alternative solutions like AirPlay (for Apple) or Google Cast (for Chromecast), which requires a connection to a shared network.

The main features of the technology on Redmi 9:

• 📶 Direct Connection – The phone creates an access point to which the TV or adapter connects.
• 🎮 Low latency – in ideal conditions, lag is 30-50ms, which is acceptable for watching video, but not always for gaming.
• 🔋 Increased battery consumption – wireless broadcasting actively uses Wi-Fi modules and processor, so the phone discharges faster.
• 📺 Limited resolution – maximum quality depends on the TV model, but usually does not exceed the maximum resolution. 1080p 30 Hz.

It is important to note that Redmi 9 does not support the DLNA — This protocol is designed to transfer media files (photos, videos, music) to devices on the local network, but not to duplicate the screen. DLNA, Then you will need third-party software or an adapter with Miracast to broadcast the screen.

Another nuance is codecs, and some TVs may not play Redmi 9 videos because they don't have codec support. H.265 (HEVC) or VP9. In these cases, the image will slow down or not broadcast at all. MX Player with software decoding.

What devices support wireless display with Redmi 9

The list of compatible devices depends on Miracast (or Wi-Fi Display) support, and the main categories are:

Supported devices:

• 📺 Smart TV from Miracast: Xiaomi Mi TV (All models), Samsung (series) QLED, Crystal UHD 2018+), LG (series OLED, NanoCell), Sony Bravia (2015+).
• 🖥️ Monitors with Wi-Fi Display: for example, ASUS ZenScreen Touch or Portable Monitor with Miracast support.
• 🎥 Projectors: Xiaomi Mi Projector, Epson, BenQ (models with Wi-Fi Direct).
• 🔌 Adapters: Microsoft Wireless Display Adapter, AnyCast, Miracast-dongle (e.g. Xiaomi Mi) TV Stick in receiver mode).

Devices with limited support or requiring adapters:

• 🍎 Apple TV — It does not support Miracast, but you can use AirPlay through apps like ApowerMirror.
• 📱 Smart speakers with display (such as Amazon Echo Show) – usually not compatible.
• 🖥️ Older monitors/TVs – you will need a separate Miracast adapter (e.g. ScreenBeam or Netgear) PTV3000).

To check your TV’s compatibility, go to its settings and look for items like: → Wi-Fi Direct, Screen → Wireless display or Miracast. If you don't have those options, you'll probably need an external adapter.

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If your TV doesn’t support Miracast, there is free TV. HDMI-Buy an inexpensive AnyCast adapter (about 1000-1500) ₽). It converts the Wi-Fi Direct signal into HDMI It works with most smartphones, including the Redmi 9.

Step-by-step: how to turn on the wireless display on Redmi 9

You can activate the screen broadcast on Redmi 9 in a few steps.

• 🔋 The phone has enough charge (minimum 30%).
• 📶 Wi-Fi and Bluetooth enabled (even if not used).
• 📺 Receiving device (TV/adapter) ready to connect.

Instructions:

1. Open Settings on Redmi 9.
2. Go to Connection and Sharing → Wireless Display.
3. Activate the Wireless Display slider (if it's gray, turn on Wi-Fi).
4. In the list of available devices, select your TV or adapter.
5. Confirm the connection on both devices (entry may be required) PIN-code).

If the TV is not on the list:

• 🔄 Reboot both devices.
• 📡 Check if Wi-Fi Direct or Screen Mirroring is enabled on your TV.
• 📱 Update the firmware on Redmi 9 (up-to-date version) MIUI improve compatibility).

Enable Wi-Fi on your smartphone

Check the battery charge (>30%)

Activate Wi-Fi Direct on your TV

Update MIUI firmware to the latest version

Make sure the distance between the devices < 5 meters-->

Once you have successfully connected, you will see a broadcast notification in the Redmi 9 curtain.

• 🔊 Turn off the sound on your phone (so it only plays on the TV).
• 📱 Switch to Audio Only (for listening to music).
• ⚙️ Set up the permission (usually by default) 720p battery-saving).

Common Problems and Their Solutions

Even with the right setup, Redmi 9 users face typical problems, and here are the most common ones and ways to fix them:

Problem 1: Connection is cut off in a few minutes

⚠️ Note: If the broadcast is interrupted, check the settings → Battery → Power saving mode. Turn it off — MIUI Can limit background Wi-Fi activity to save charge.

Also, the reasons may be:

• 📶 Weak Wi-Fi signal – reduce the distance between devices or remove sources of interference (microwaves, other routers).
• 🔋 Low battery power – connect your phone to charge.
• 📱 Outdated firmware - update MIUI last-minute.

Problem 2: The picture is slowing down or tearing

It has to do with:

• 🎞️ High resolution – try to reduce the quality to 720p broadcast.
• 📡 Busy network – disconnect other devices from Wi-Fi or switch router to 5GHz channel (if supported).
• 🔧 Codecs - Some videos (especially in the 4K or HDR) You can't play smoothly. Use supportive players. MX Player or VLC.

Problem 3: No sound on the TV

Decisions:

• 🔊 Check if the sound in the Redmi 9 notification curtain is turned off (speaker icon).
• 📺 Choose the right sound source (usually) HDMI ARC or PCM).
• 🎵 Restart the broadcast – sometimes the sound is not picked up the first time.

Problem 4: The TV is not on the list of devices

Possible causes:

• 📡 Wi-Fi Direct is turned off on your TV – turn it on in the network menu.
• 🔄 Conflict IP-Addresses - Reboot the router.
• 📱 An outdated version MIUI — Update the firmware through Settings → The phone. → Updating the system.

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If nothing helps, try resetting your network settings to Redmi 9 (Settings) → System system → Resetting settings → Resetting Wi-Fi, mobile network and Bluetooth settings. This often solves connection problems.

How to improve the quality of the broadcast: tips and tricks

To ensure that the wireless display works stably, follow these guidelines:

1. Optimize your Wi-Fi settings:

• 📶 Use the 5GHz band (if supported) – it’s less congested and provides more bandwidth.
• 🔄 Switch the router to a channel with minimal interference (use applications like Wi-Fi Analyzer).
• 📡 Disconnect other devices from the network during broadcast.

2. Set up the phone:

• 🔋 Connect Redmi 9 to charging – this will prevent performance limitations due to energy saving.
• ⚙️ In the broadcast settings, select Performance instead of Quality (if available).
• 🧹 Close background applications – they can load the processor and cause lags.

3. Choose the correct permission:

The following modes are available on Redmi 9:

• 480p — Minimum delay, suitable for gaming.
• 720p — Balance between quality and stability.
• 1080p — High quality, but can slow down on weak TVs.

When broadcasting games (for example, PUBG Mobile or Call of Duty, choose 480p or 720p — This will reduce the delay to an acceptable level (~40-60 ms).

4. Use third-party applications for advanced features:

• 🎮 ApowerMirror – allows you to broadcast the screen on a PC or Mac with less latency.
• 📺 LocalCast – supports broadcasting of local video files without compression.
• 🎵 SoundWire – separate transmission of sound over Wi-Fi (useful if the image is on the HDMI, And the sound is on the speakers).

Alternative ways to broadcast the screen with Redmi 9

If Miracast doesn’t work or doesn’t like the quality, consider alternative methods:

1. Google Cast (Chromecast)

While Redmi 9 doesn’t support Google Cast natively, you can use workarounds:

• Install the Google Home app and connect your Chromecast or TV with Google TV.
• To broadcast the screen, use the option Broadcast screen in Google Home (does not work on all firmware) MIUI).
• 🔴 Limit: Delay higher than Miracast (~100-200 ms, but better compatibility with services like YouTube or Netflix.

2. USB-C → HDMI adapter

For minimal latency (ideal for gaming), use a wired connection:

• Buy an adapter. USB-C to HDMI (for example, Baseus or UGREEN).
• Connect your phone to your TV with a cable – the delay will be less than 20 ms.
• ⚠️ Note: Redmi 9 doesn’t support DisplayPort Alt Mode, so the adapter must be on the chip MHL or have an external power supply.

3. DLNA media-file

If you want to broadcast only a video or photo, and not the whole screen:

• Use apps like BubbleUPnP or Plex.
• Turn it on on the TV. DLNA-server (usually in the Network section).
• 🎬 Plus: No delay, as only files are transferred, not screen stream.
• 🔴 Disadvantage: You can not broadcast games or other applications.

4. TeamViewer or AnyDesk for remote management

If you want to show the Redmi 9 screen on PC:

• Install TeamViewer QuickSupport on your phone and TeamViewer on your computer.
• Connect to the phone through ID — The screen will be duplicated with a delay. ~100-300 ms.
• 💡 Suitable for presentations, but not for video or games.

Comparison of wireless display with other technologies

To choose the best way to broadcast, compare Miracast with the alternatives:

As you can see from the table, Miracast is the best choice for Redmi 9 if you want versatility and minimal latency. USB-C → HDMI, For video streaming, Google Cast or DLNA.

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If you want to stream a screen on a PC, the best option is ApowerMirror or TeamViewer. For TVs without Miracast, AnyCast adapter or Chromecast (with restrictions) will do.

FAQ: Frequent questions about wireless display on Redmi 9