what to do when Xiaomi casting keeps disconnecting is the central topic of this article, and the following content explains the key points, practical uses, and decisions around it.
Xiaomi casting, the built-in screen mirroring feature that lets users replicate their phone, tablet, or laptop display to TVs, projectors, or other smart devices, is a convenient tool for streaming movies, giving presentations, or sharing photos with family. However, many users encounter a frustrating recurring issue: constant disconnections during casting sessions, even mid-stream or when only a few minutes into a presentation. If you’re asking what to do when Xiaomi casting keeps disconnecting, you’re not alone—Xiaomi’s 2024 Smart Device Support Report notes that this issue accounts for nearly 28% of all support tickets related to screen mirroring, with most fixes being simple, user-applicable steps rather than costly hardware replacements.
Check Basic Device and Network Alignment
Many Xiaomi casting disconnections stem from simple misconfigurations of devices or network settings, rather than complex underlying issues. The first step in troubleshooting is to rule out basic alignment problems that often cause instability.
Confirm Both Devices Are On The Same Wi-Fi Network
The core technology behind Xiaomi casting relies on peer-to-peer (P2P) Wi-Fi or a shared network connection to transfer display data between the casting device and the display receiver. If the two devices are not on the same network, the casting session will drop repeatedly, as there is no valid connection to route data. For Xiaomi TVs and Miracast receivers, this means both your casting phone and the display must be connected to the same 2.4GHz or 5GHz Wi-Fi network (note: older Xiaomi TV models pre-2018 typically only support 2.4GHz). To verify, open your TV’s network settings and match the SSID (network name) to the one your phone is using for Wi-Fi.
Update Firmware and Casting Apps On Both Devices
Outdated software is a top cause of connectivity bugs, as manufacturers regularly release patches to fix casting-specific issues. For Xiaomi phones, go to Settings > About Phone > System Update to install pending MIUI updates, which often include fixes for screen mirroring instability. For Xiaomi TVs, navigate to Settings > About > System Update to update the TV’s built-in casting software. If you’re using a third-party receiver (such as Amazon Fire TV Stick or Chromecast), update the casting app on the receiver to ensure compatibility with your Xiaomi device.
Optimize Wi-Fi Settings For Stable Casting
Wi-Fi network conditions play a critical role in casting stability, as high interference, congestion, or misconfigured router settings can cause constant disconnections. Adjusting these settings can resolve up to 50% of Xiaomi casting disconnection issues, per Xiaomi’s internal support data.
Prioritize 5GHz Wi-Fi For Faster Transfer
The 2.4GHz Wi-Fi band has a longer range but suffers from higher interference from common household devices like microwaves, baby monitors, and Bluetooth accessories. The 5GHz band offers faster speeds and less congestion, making it ideal for high-resolution casting (1080p or 4K). If your devices support 5GHz, connect both the casting device and receiver to a 5GHz network to reduce disconnections. If only 2.4GHz is available, try to keep the router away from metal objects and other electronics to minimize signal interference.
Disable Band Steering On Your Router
Many modern routers use band steering, a feature that automatically switches devices between 2.4GHz and 5GHz based on signal strength. This automatic switching can cause sudden disconnections mid-cast, when the router incorrectly reassigns your casting device to the wrong band. To fix this, log into your router’s admin panel (usually via a browser at 192.168.1.1 or routerlogin.net) and turn off band steering. For Xiaomi-specific routers, open the Mi Wi-Fi app, go to Network Settings > Advanced Settings, and toggle off "Band Steering" to prevent automatic band switching.
- Place your router in a central, elevated location, away from walls, metal appliances, and other electronics that block Wi-Fi signals.
- Limit the number of high-bandwidth devices connected to your network during casting sessions, such as gaming consoles or 4K streaming boxes, to reduce bandwidth strain.
- Use a wired Ethernet connection for your display device (like a Xiaomi TV or projector) if possible, as wired connections eliminate almost all wireless interference.
Resolve Software Glitches With Targeted Troubleshooting
If network and firmware checks don’t fix the disconnection issue, the problem is likely a temporary software glitch on either the casting device or receiver, which can be resolved with simple, targeted steps. These glitches are often caused by conflicting cache data, aggressive power optimization, or misconfigured background settings.
Start with the simplest fix: restart both the casting device (phone, tablet, or laptop) and the display receiver (TV or projector). Xiaomi’s support team reports that 32% of casting disconnection issues are resolved with a full reboot, as this clears temporary software bugs that block network connections. For persistent issues, clear the cache of the screen mirroring feature on your Xiaomi phone: go to Settings > Apps > See all apps > Search for "Screen Cast" > Storage & cache > Clear Cache. This removes temporary files that may be causing conflicts between the device and the receiver.
Power optimization settings on Xiaomi devices often restrict background network access to save battery, which can interrupt casting sessions. For MIUI-based Xiaomi phones, go to Settings > Battery & Performance > Battery Saver > Manage app battery usage, find "Screen Cast", and set it to "No restrictions". For laptops, adjust power settings to prevent the Wi-Fi connection from pausing: on Windows, go to Settings > System > Power & battery > Additional power settings > Change plan settings > Change advanced power settings, then expand Wireless adapter settings and set both "On battery" and "Plugged in" to "Maximum performance". On Mac, go to System Settings > Wi-Fi > Advanced, and uncheck "Require link state change notification for low power mode" to avoid Wi-Fi disconnections during casting.
If none of these steps work, try resetting the screen mirroring feature on your Xiaomi TV: for Mi TVs, go to Settings > Network & Internet > Screen Cast > Reset, then restart the TV. This clears all stored connection data and re-establishes the link with your casting device.
Concluding takeaways for fixing Xiaomi casting that keeps disconnecting: Start with basic checks to confirm devices share a network and are updated, then optimize Wi-Fi settings to reduce interference, and resolve software glitches with reboots, cache clears, and adjusted power settings. By following these steps, you can resolve 90% of common Xiaomi casting disconnection issues without professional support.
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