Modern smartphones such as Samsung Galaxy M31, have powerful displays, but viewing content on a large screen often requires displaying the image on a TV. This is especially true when you want to watch a movie with the whole family or show off photos from a party. Fortunately, wireless technology Wi-Fi allows you to do this without unnecessary wires and complicated settings.
The process of synchronizing a device with a TV is based on protocols Miracast And DLNA, which are built into the Android operating system. You don't need to purchase additional HDMI cables or adapters if your TV supports Smart TV. Even if you have an older TV model, there are ways to bypass these limitations using special adapters or software solutions.
In this article, we'll cover all available connection methods in detail, from built-in One UI features to third-party apps. You'll learn how to set up a high-quality picture, avoid audio lag, and what to do if devices can't see each other on the same network. Setup takes just a couple of minutes, and the results will allow you to enjoy content in a new format.
Preparing devices for wireless connection
Before you begin setting up, you need to make sure that both devices are yours. Samsung M31 and the TV are in working order and ready to communicate. The most important requirement for successful synchronization is that both devices must be connected to the same Wi-Fi networkIf your router broadcasts signals on both 2.4 GHz and 5 GHz frequencies, make sure your phone and TV are connected to the same frequency, as routers can sometimes isolate subnets from each other.
Check the software version on your smartphone. For Samsung Galaxy M31 Security and system updates are current, which may contain fixes for wireless protocols. Go to Settings and make sure the function is enabled. Wi-Fi Direct or Smart View active. You also need to enable external signal reception mode on your TV, which is often called Screen Mirroring, Miracast, or simply "Broadcast from Phone."
⚠️ Note: If your router is using a guest network or has AP Isolation enabled, devices will not be able to discover each other. In this case, temporarily disable this feature in your router settings.It's important to remember that data transfer speed directly depends on the quality of the Wi-Fi signal. If the router is located far away or behind thick walls, image quality may decrease, and artifacts or lag may occur. For best results, it's recommended to be in the same room as the access point.
Using the built-in Smart View feature
The easiest and most reliable way to broadcast your screen Samsung M31 on TV - use the native function Smart ViewThis technology was developed specifically for the Samsung ecosystem and ensures minimal latency in image transmission. It allows not only screen mirroring but also the use of the phone as a remote control or background content playback.
You don't need to download any third-party apps to activate this feature. Simply swipe down from the top of the screen to open the Quick Settings panel and find the icon. Smart ViewIf you don't see it on the first page, swipe left or tap the three dots to edit the list. Once tapped, the phone will begin searching for available devices within range.
☑️ Check before connection
Completed: 0 / 5When your TV's name appears in the list, tap it. A connection permission prompt may appear on the TV screen—confirm it with the remote. From this point on, your smartphone's content will be mirrored to the big screen. You can minimize apps, reply to messages, and the content will continue playing on the TV.
Function Smart View Supports Bluetooth audio streaming if your TV doesn't have built-in speakers or you're not satisfied with their quality. You can also change the aspect ratio so the image fills the entire screen without black borders, or use your phone as a touchpad.
Setup via the Samsung SmartThings app
If the standard quick access panel does not find the TV or you want to get advanced control over the device, use the app Samsung SmartThingsIt comes pre-installed on most of the brand's devices, but can be downloaded from Google PlayThis app serves as a single control center for your smart home and allows you to fine-tune display settings.
After launching the app, click the Add Device button or select your TV from the "Devices" list. The app interface is more informative: it displays the signal strength, TV firmware version, and available features. SmartThings You can not only mirror your screen, but also transfer files, control the volume, and even launch certain apps on your TV directly from your phone.
In the application settings, you can activate the "Automatic broadcast" function, which allows you to start the video on the TV immediately after it is opened in the gallery or video player on Samsung M31This is convenient if you often watch videos on a large screen and don't want to go through the device search process every time.
Why might SmartThings not see my TV?
The SmartThings app requires the corresponding service to be running on your TV. On older Samsung models (pre-2016) or TVs from other brands, full functionality may not be available. In this case, use the "Screen Casting" mode within the app, which uses the Miracast protocol regardless of TV brand.
It is important to note that for all functions to work SmartThings account authorization required Samsung AccountMake sure you are logged in to your profile, otherwise some management features may be blocked.
Streaming videos from YouTube and online cinemas
Often, users don't need to mirror their entire smartphone screen, but simply want to play a video from YouTube, Netflix, or another service on their TV. There's a technology for this. Google Cast (Chromecast built-in). This is the most energy-efficient method, as the video is buffered by the TV itself, and the phone only acts as a remote control.
Open an app, such as YouTube, on your Samsung M31At the top of the player, find the rectangle icon with waves (broadcast). Click it and select your TV from the list. The video will play on the big screen, leaving you free to use your phone for other tasks, like videos, or search for other videos.
The advantage of this method is that the picture quality will be the highest supported by your subscription plan and internet speed, since the TV receives the stream directly from the network, not through the phone. Furthermore, the smartphone's battery drain is significantly less than with full screen mirroring. Smart View.
⚠️ Note: For streaming from apps to work, both devices must be signed in to the same Google account or be on the same network. Some services may block streaming if you use a VPN or proxy server.If the cast button doesn't appear, make sure the YouTube app and Google Play services are updated to the latest version. Also, check that the appropriate app (such as YouTube for TV) is running on your TV, although most modern models run it in the background.
Solution and connection problems
Despite the simplicity of the technology, sometimes situations arise when Samsung M31 The TV doesn't detect it, or the connection keeps dropping. One common cause is outdated router or TV firmware. Manufacturers regularly release updates that improve protocol stability. DLNA And Miracast.
Try rebooting all your devices one by one: turn off your TV and smartphone, unplug your router for 10-15 seconds, then turn it on, wait until the network is fully loaded, and only then turn on the other devices. This often resolves the "invisible" device issue.
📊 What problem do you encounter most often?The TV doesn't see the phone.Low image qualitySound delayFrequent connection breaksIf the image is transmitted but the sound is missing or out of sync, try switching the audio output to Bluetooth (if a speaker is connected) or back to the TV in the Smart View settings. It's also worth checking that no heavy apps are running in the background that are consuming CPU and Wi-Fi bandwidth.
The table below lists the main symptoms and how to treat them:
Symptom Possible cause Solution The TV is not showing up in the list. Different Wi-Fi networks Check the network name on both devices The picture is jerky or of low quality Weak Wi-Fi signal Move closer to the router or reduce the distance to the TV No sound during broadcast DRM blocking Use the Cast button within the app instead of Smart View Image lag Channel loading Disable downloads on other devices on the network Alternative methods and third-party applications
In cases where built-in tools don't work or your TV isn't a Smart TV, you can use third-party solutions. Apps like Web Video Caster or TV Cast allow you to stream content from your browser or local files to your TV using protocols DLNA or HTTP.
For TVs without Smart TV but with an HDMI port, there are special adapters (such as Chromecast, Miracast dongles, or Apple TV). These plug into the HDMI input and create a hotspot or connect to your Wi-Fi, after which Samsung M31 sees them as a normal broadcast device.
Another option is to use a USB cable and mode DeX (if supported by your model and software version, although full-fledged DeX is not available for the M31, there are simplified analogs through third-party applications such as ApowerMirror (with USB debugging connection). This ensures a stable, lag-free connection, but requires a cable.
When using third-party apps, carefully monitor the permissions you grant them. Access to the local network and media files is necessary for proper operation, but access to contacts or the microphone may be excessive.
Frequently Asked Questions (FAQ)
Is it possible to connect Samsung M31 to a TV without Wi-Fi?
Yes, this is possible using a USB-C to HDMI cable (if your phone supports video output, which is limited on the M31) or via a USB cable using USB casting apps. You can also use Miracast adapters, which create their own Wi-Fi network without the need for a home router.
Why is the screen black when streaming via Smart View, but the sound works?
This often happens when trying to stream protected content (DRM) from apps like Netflix or iTunes using simple screen mirroring. In such cases, you should use the built-in "Cast" button within the video service app itself.
Does connecting a phone to a TV affect internet speed?
When using Cast technology (when the TV downloads the video itself), no—the phone only gives commands. When using Smart View, the phone actively streams the video, which can strain the Wi-Fi network, especially if the network is overloaded with other devices.
Will the broadcast work if there is a call on the phone?
When mirroring your screen (Smart View), the caller's image appears on your TV. When broadcasting via Cast (YouTube, etc.), the video on the TV usually pauses or continues playing, while the call interface opens on your phone, and the audio may switch to your phone's speaker.