Why Xiaomi Phone to TV is Broadcasting: A Complete Analysis of Causes and Solutions

Are you trying to stream a video with Xiaomi Redmi Note 12 or POCO X5 Pro to the big screen, but the picture is constantly “slowing down”, the sound lags, and sometimes the connection is completely cut off? The problem is familiar to millions of users – according to a survey by Mi Community, 68% of Xiaomi smartphone owners have experienced delays when wirelessly broadcasting to TV. In this article, we will not just list possible reasons, but analyze them from the technical side: from the limitations of the Qualcomm Snapdragon chipset to the Miracast protocol features in Samsung QLED or LG OLED TVs.

It's important to understand that broadcast lags are always a complex problem. Even if you have a top-end Xiaomi 14 Ultra with Wi-Fi 6E support, but a 2018 TV with an outdated Wi-Fi 4 module, the conflict of standards is guaranteed to lead to delays. We analyzed user reports, tests with Mi TV Stick and Google TV, and data from service centers, and identified 10 key factors that affect streaming smoothness. Let's start with the most obvious, but often ignored, network quality.

1. Wi-Fi problems: why even 5GHz doesn't save you from lags

Most users mistakenly believe that switching to 5GHz will automatically solve all delay problems. In practice, it is more complicated: Xiaomi defaults to an adaptive channel selection algorithm that can “jump” between 2.4GHz and 5GHz depending on the load, which leads to microlatency when changing frequencies — especially noticeable when streaming video in 4K HDR.

Another catch: many TVs (like the Sony Bravia X90J) support 5GHz, but only on 36-48 channels, while Xiaomi smartphones default to 149-165 (DFS) channels, which are theoretically freer, but require additional radar checks — which introduces delays of up to 150-200 ms per reconnection.

• 📶 Decision 1: Manually set a static channel 5 GHz in router settings (for example, 40 or 44). Avoid. DFS-channel (100-140), If your TV doesn't support them.
• 🔄 Solution 2: Turn off the Smart Band Steering (or Band Selection) function in the router – it forcibly switches devices between ranges, which causes lags.
• 📡 Decision 3: If you have a dual-band router, create two separate networks (e.g., a two-band router, MyWiFi_2G and MyWiFi_5G) Connect your phone and TV to the same network 5 GHz.

⚠️ Note: Some Xiaomi Mi TVs TV (for example, models 2020-2021 years) have a bug with a Wi-Fi driver, which is why you connect to the 5 The GHz is gone. In this case, you'll have to use it. 2.4 GHz, but with bandwidth restriction to 20 MHz (in router settings).

2. Protocol conflict: Miracast vs. Google Cast vs. Wi-Fi Direct

Xiaomi smartphones support three main wireless broadcast protocols, and each of them has its own pitfalls:

Miracast (built into Settings → Connection & Sharing → Wireless Display) should theoretically provide minimal latency, but in practice suffers from two problems:

1. On-the-fly video compression by a smartphone’s processor – even the Snapdragon 8 Gen 2 doesn’t always cope with real-time 4K HDR encoding.
2. Driver restrictions on TVs: For example, Samsung artificially limits Miracast bitrate to 15 Mbps, resulting in artifacts.

Google Cast (via Google Home or in-app stream icon) is more stable, but depends on Google servers. If you have DNS enabled from the provider, packets can go in roundabout ways, increasing latency. Wi-Fi Direct is the fastest, but only works between devices of the same ecosystem (e.g. Xiaomi phone → Mi TV).

Turn off the VPN on your phone

Set a static IP for TV in the router

Update your TV firmware (especially for Samsung Tizen)

Try alternative apps (e.g. ApowerMirror)

Reset network settings on your phone (Settings) → System system → Reset → Reset Wi-Fi, mobile network and Bluetooth)-->

3. Hardware Limitations: Why Even Xiaomi's Flagships Are Slowing Down

If you’re streaming from Xiaomi 13T Pro to LG C2 OLED and you’re still watching lags, the problem may be codec mismatch. Modern smartphones use H.265 hardware encoding (HEVC), but many TVs (especially budget ones) only support H.264 (AVC), in which case software recoding takes place, which adds up to a delay of up to 300-400 ms.

The second hardware trap is the bandwidth limitation of the chipset.

• Chipset series Snapdragon 7xx (for example, 778G+ in POCO X4 Pro) have a total Wi-Fi + Bluetooth bandwidth of 1.2 Gbps When broadcasting 4K@60fps (bitrate ~50 Mbps) and simultaneous connection of headphones over Bluetooth conflicts arise.
• In budget models (Redmi) 10A, POCO M5) It uses single-band Wi-Fi. 5 (1x1 MIMO), Limits the actual speed to 200-300 Mbps – not enough for stable 4K-broadcast.

Critical moment: in Xiaomi smartphones on MediaTek chipsets (for example, Helio) G99 Redmi Note 12) long-broadcast (>30 minutes) processor trottling is activated, causing a drop FPS before 20-25 This is due to the limitations of the cooling system and energy saving algorithms MIUI.

4. MIUI settings that kill stream smoothness

MIUI is optimized by default for battery savings, not performance, which means that background processes (including broadcasting) can be artificially constrained.

1. Settings → Battery and Performance → Performance mode – select High Performance (disables restrictions for background tasks).
2. Settings → Special Features → GPU Acceleration – Enable this option (reduces delays when rendering video).
3. Settings → Applications → Application Management → Screen Broadcast – Turn off Background Limitation and Auto Run.

Pay special attention to the developer settings (activated via Settings → About Phone → MIUI version – tap 7 times).

• Disable Background Limitation for Processes (in the Appendix section).
• Install Windows animation = 0.5x and Transition animation = 0.5x (reduces the load on the GPU).
• Enable Forced use of the GPU (under Hardware Acceleration).

⚠️ Attention: In some firmware MIUI (for example, MIUI 14.0.3 for Xiaomi 12T) There's a bug that only works when you turn on Developer Mode, Miracast only works after you reboot. If you encounter this problem, turn off Developer Mode after you set up.

5.Television-side problems: why Samsung and LG are "slowing down" Xiaomi

TV makers often optimise firmware for their own ecosystems, ignoring compatibility with Android devices.

• Samsung Tizen: Artificially limits Miracast bitrate to 15 Mbps for non-Samsung devices.This results in video compression and lags in fast scenes.
• LG webOS: models up to 2022 do not support HEVC 10-bit, which is why Xiaomi is forced to recode video to 8-bit, losing quality and speed.
• Xiaomi Mi TV: In the firmware before MIUI TV 3.0 there is a bug with a buffer Wi-Fi Direct, which causes the video to “freeze” every 10-15 seconds.

The solutions depend on the TV brand:

• 📺 For Samsung: Update your firmware to the latest version (in 2023, Samsung added Miracast support without bitrate restrictions).If the update doesn't help, use Google Cast through the SmartThings app.
• 🎯 For LG: Turn on Game Optimizer mode (reduces video processing delays) and turn off AI Sound Pro (it adds latency to the sound).
• 🔧 For Xiaomi Mi. TV: Reset network settings (Settings) → Network → Network reset) and disable Automatic Software Update (background updates may interrupt broadcasting).

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If your TV supports Apple AirPlay (like the Sony X95K), try streaming through the AirScreen app on your phone, which is often more stable than Miracast, thanks to optimization for streaming video.

6 External interference: why even perfect settings don't help

If you have checked all the settings but the lags remain, the problem may be external factors:

• 📡 Overloaded Wi-Fi Channel: Use the WiFi Analyzer app to find the least congested channel 5 GHz: Avoid channels running adjacent networks with higher signal power -60 dB.
• 🔌 Power router: If the router is connected through an extension cord or a weak power supply, at high load (broadcast) + It can sink in speed. Connect the router directly to the outlet.
• 📱 Background tasks on your phone: Apps like Telegram or Tinkoff can download data in the background by occupying a channel. Before broadcasting, turn on Flight Mode, then manually turn on Wi-Fi.
• 🌡️ Overheating of the smartphone: At the temperature of the processor above 75°C (checked through AIDA64) activated trottling, which leads to a fall FPS. Remove the case and broadcast in a horizontal position (for better cooling).

Critical: If you have a dual-band router with a shared SSID (one network name for 2.4 GHz and 5 GHz), the smartphone can automatically switch to 2.4 GHz when the 5 GHz signal is weakened. This leads to microlatency when you change range. Solution - divide the networks into two different SSIDs.

7. Alternative broadcasting methods: when wireless does not help

If all attempts to set up a wireless broadcast failed, consider alternative options:

The most reliable way is to connect through wired USB-C → HDMI. For that:

1. Buy an adapter that supports DisplayPort Alt Mode (such as Anker 565 or Baseus 8K).
2. Turn on the phone settings Debugging over USB (Settings → About Phone → MIUI version – 7 taps).
3. Connect the adapter and select DisplayPort mode (some phones need to confirm permission to display the image).

If wired connection is not possible, try Mi. TV Stick. Unlike the built-in Miracast, it uses Google Cast's optimized protocol, which is better at streaming video. TV Stick to USB-TV port for additional power (otherwise there may be lags due to lack of energy).

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Wireless connectivity via USB-C → HDMI is the only way to get a 0 ms latency and broadcast 4K@120fps without loss of quality. Wireless protocols are physically unable to provide this speed due to the limitations of the Wi-Fi 6 standard (max 9.6 Gbps in theory, ~1 Gbps in practice).

FAQ: Frequent questions about lags when broadcasting from Xiaomi on TV