Why your phone stopped detecting your TV via Wi-Fi: full diagnostics and fixes

You are trying to stream video from your phone to the big screen, but The TV suddenly disappeared from the list of available devicesThis situation is familiar to many: yesterday everything was working, but today the smartphone stubbornly refuses to detect the Smart TV via Wi-Fi. The reasons could lie in the phone settings, the TV firmware, router issues, or even physical interference. In this article, we'll look into it. all possible scenarios — from a banal connection failure to hidden protocol conflicts Miracast, DLNA And Wi-Fi Direct.

It is important to understand: In 78% of cases, the problem is resolved by resetting the network settings on one of the devices or updating the firmware. (data from service centers Samsung And LG for 2026). But there are also deeper reasons - for example, the incompatibility of standards Wi-Fi 6 And Wi-Fi 5 in new phone models. We've compiled a diagnostic checklist that will help you identify the root of the problem without any unnecessary intervention.

If you use Android or iPhone, Samsung Smart TV, LG WebOS or Sony Bravia The instructions below apply to all combinations. At the end of the article, you'll find a compatibility chart for popular models and an FAQ with answers to frequently asked questions.

1. Checking the basic connection conditions

Before digging deep into the settings, make sure you have completed minimum requirements for wireless broadcasting:

• 📶 Both devices are connected to the same Wi-Fi network (For DLNA And Screen Mirroring). Exception - Wi-Fi Direct, where a direct network is created.
• 🔄 Do Not Disturb mode is disabled on the phone (on iPhone check Focus modes, on Android — Do not disturb).
• 🔋 The phone's charge level is above 20%Some models (for example, Xiaomi) block broadcasting when battery is low.
• 📺 The TV is on and not in sleep mode.On . LG WebOS check that the mode is activated Screen mirroring in quick settings.

If at least one condition is not met, the phone physically won't be able to detect the TVFor example, on Samsung Galaxy When power saving mode is enabled, scanning of local devices is disabled Wi-Fi DirectAnd on iPhone broadcast AirPlay is blocked if the TV is connected to the router's guest network.

2. Wi-Fi Standards Conflicts: Why New Phones Can't See Old TVs

One of the most non-obvious reasons - incompatibility Wi-Fi standards. Modern smartphones (for example, iPhone 15 or Samsung Galaxy S24) support Wi-Fi 6/6E, while TVs from 2018–2020 often only work on Wi-Fi 5 (802.11ac) or even Wi-Fi 4 (802.11n)This leads to two problems:

1. Undetectable: the phone simply does not see the TV network due to different frequency ranges.
2. Connection breaks: Even if the connection is established, the broadcast lags or is interrupted.

Solutions:

• 🔧 Forcefully limit the Wi-Fi standard on your phoneOn . Android go to Settings → Wi-Fi → Advanced → Wi-Fi Mode and select 802.11a/b/g/n (turn off ac/ax).
• 📡 Set up your router. In the admin panel (192.168.1.1) turn it off Wi-Fi 6 or activate compatibility mode Legacy Mode.
• 🔄 Use Wi-Fi DirectThis protocol bypasses the router and often solves the incompatibility problem.

How to check the Wi-Fi standard on a TV?

On the majority Samsung And LG the standard is displayed in the menu Settings → Network → Network StatusOn . Sony Bravia you need to hold down the button HOME and choose Settings → Network → Advanced settings.

⚠️ Attention: If your TV is older than 2019, a firmware update may worsen Compatibility with new phones. Before updating, check reviews on forums (for example, 4PDA or Reddit).

3. Broadcast Protocol Issues: Miracast vs. DLNA vs. AirPlay

Phone and TV can use different protocols for wireless broadcasting. Here's how to distinguish them and set them up:

• 🖥️ Miracast (Screen Mirroring): mirrors your phone's screen to your TV. Works on Android And Windows, but not supported iPhone.
• 📱 DLNA: transfers only media files (photos, videos, music), without screen mirroring. Supported by Android, And iOS.
• 🍎 AirPlay: exclusive protocol Apple for broadcasting with iPhone/iPad on compatible TVs (for example, LG with WebOS 4.0+ or Samsung with AirPlay 2).

If the phone does not see the TV, most likely, the required protocol is disabled on one of the devices. Here's how to enable each one:

Enable Miracast on your TV (Settings → Connection → Screen Mirroring)

Activate DLNA in the TV menu (Settings → Network → DLNA Server)

Update your TV's firmware to support AirPlay 2 (for iPhone)

Reboot your router (sometimes this clears multicast traffic blocks) -->

On Samsung Smart TV path to settings Miracast: Settings → General → External devices → Screen mirroring devices.

On LG WebOS: Settings → Network → Miracast and Wi-Fi Direct.

⚠️ Attention: On iPhone broadcast AirPlay is blocked if the TV is connected to the network with with client isolation enabled (Client Isolation) in your router. Disable this option in your Wi-Fi network settings.

4. Router Problems: Why is it Blocking the Connection?

Often it is not the phone or the TV that is to blame, but routerHere are typical scenarios:

• 🚫 Blocking multicast trafficProtocols DLNA And Miracast use multicast packets, which some routers filter.
• 🔒 AP IsolationIf enabled, devices on the network cannot see each other.
• 🔄 Double NATThis occurs when a second router (for example, from a provider) is connected to the main router, disrupting the local network.
• 📶 Channel congestionIf there are more than 10 devices connected to the router, it may ignore scanning requests.

How to check and fix:

1. Go to your router control panel (192.168.0.1 or 192.168.1.1).
2. Find the section Local Area Network (LAN) or Wireless network (Wi-Fi).
3. Disable options: AP Isolation, Client Isolation, Multicast Filtering.
4. If used Wi-Fi 6, try turning it off 160 MHz Channel Width (leave 20/40 MHz).

For routers TP-Link path: Advanced Settings → Wireless → Wireless Settings → Enable Multicast (IGMP Proxy).

5. Software failures: updates, cache, errors

In 40% of cases the problem lies in software failure on the phone or TV. Symptoms:

• The TV appears in the list of devices and then disappears.
• An error occurs when trying to connect "Unable to connect" or "The device is not responding".
• The indicator on the TV is flashing Wi-Fi, but the connection is not established.

Actions in order:

1. Clearing the cache on the phone:
   • On Android: Settings → Apps → Screen Mirroring (or Smart View) → Storage → Clear Cache.
   • On iPhone: reboot your device (cache AirPlay resets automatically).
2. Reset network settings:
   • On Android: Settings → System → Reset → Reset Wi-Fi, Bluetooth & mobile network settings.
   • On iPhone: Settings → General → Transfer or reset iPhone → Reset network settings.

Firmware update:

• On TV: Settings → Support → Software Update → Update Now.
• On your phone: Check for updates in Settings → Software Update.

If after the update the TV stopped seeing all devices, there may have been a firmware error. In this case:

1. Roll back to the previous software version (if available).
2. Reset your TV to factory settings (Settings → Support → Self-diagnosis → Reset).

⚠️ AttentionOn TVs Sony Bravia 2020–2021 releases may require license reactivation after reset. Google CastTo do this, you need to reconnect to the internet and accept the terms of use.

6. Physical interference and hardware failures

If all software methods have been tried, but the phone still does not see the TV, the problem may be hardware. Check:

• 📡 Distance between devices. For Wi-Fi Direct The maximum range is 10 meters without obstacles. Walls, furniture, and even aquariums weaken the signal.
• 🔌 TV power supplyIf the TV is connected through an extension cord or power strip, try plugging it directly into a wall outlet—unstable power can interfere with operation. Wi-Fi-module.
• 📱 Wi-Fi antennas on a TVOn some models (for example, Samsung QLED 2019) antennas are located at the back and can be accidentally bent or damaged.
• 🔋 OverheatIf the TV has been on for a long time, it Wi-FiThe module may shut down to cool down. Let it cool for 10–15 minutes.

How to check hardware health:

1. Connect another device (laptop, tablet) to the TV via Wi-Fi DirectIf it also doesn't see the TV, the problem is in the TV.
2. Try connecting your phone to another TV or Wi-Fi- printer. If it doesn't see any devices, the problem is with the phone.
3. Use a Wi-Fi analyzer app (eg. WiFi Analyzer on Android or AirPort Utility on iPhone) to check if the phone sees any devices on the local network at all.

If you suspect a malfunction Wi-FiIf you have a TV module, contact a service center. Repairs cost between 1,500 and 4,000 rubles (module replacement), depending on the model.

7. Alternative connection methods if Wi-Fi doesn't work

If you are unable to restore your wireless connection, please use alternative methods:

• 🔌 HDMI cable with adapter:
  • For Android: need an adapter USB-C/MicroUSB → HDMI (For example, Google Chromecast or DeX For Samsung).
  • For iPhone: adapter Lightning → HDMI (official from Apple or certified).
• 📶 Chromecast/Google Cast:
  • Connect Google Chromecast to the TV through HDMI and broadcast from your phone via Google Home.
  • Works on Android, and on iOS.
• 🖥️ Smart View via USB:
  • Some Samsung TVs support phone connection via USB with screen mirroring (cable required) USB-C → USB-A).

For iPhone also available AirPlay through Apple TV (if it is connected to the TV). And on Android You can use applications like ApowerMirror or TeamViewer QuickSupport for internet broadcasting (but there will be a delay).

FAQ: Answers to Frequently Asked Questions

❓ Why doesn't my iPhone detect my Samsung TV, even though it worked before?

Most likely after the update iOS or the TV firmware support has failed AirPlay. Check:

1. On TV: Settings → General → Apple AirPlay — turn on the option.
2. On iPhone: update the application SmartThings (it is responsible for integration with Samsung TV).
3. Restart both devices.

If that doesn't help, try connecting via Google Home (if the TV supports Chromecast).

❓ My phone sees the TV, but when I connect, it says "Connection Error." What should I do?
This error occurs due to:
• 🔄 IP address conflict (reboot the router).
• 🔒 MAC address blocking (check your router settings in the section MAC filtering).
• 📱 Protocol failure Miracast (Reset the settings on your TV Wi-Fi Direct).
Solution:
1. Turn it off on your phone Wi-Fi, then turn it on again.
2. On the TV, go to Settings → Network → Network Reset.
3. Try connecting via Wi-Fi Direct instead of the usual Wi-Fi.
❓ Is it possible to connect a phone to a TV without the Internet?
Yes, for this use:
• Wi-Fi Direct: creates a direct network between your phone and TV.
• HDMI adapter: physical connection without network.
• Bluetooth: for transferring photos/music (but not video).
For Wi-Fi Direct:
1. On TV: Settings → Network → Wi-Fi Direct → Enable.
2. On the phone: in the menu Wi-Fi Find the network with the name of your TV and connect.
❓ Why can the TV see the phone, but not the other way around?
This is a typical problem. one-way visibility, which occurs due to:
• 📱 Disconnected Wi-Fi Direct on the phone (on Android: Settings → Connections → Wi-Fi Direct).
• 🔍 Hidden TV network (on some Sony Bravia net Wi-Fi Direct (It doesn't appear in the list until you click "Add device" on the TV).
• 🔄 Discovery service failure (reboot both devices).
Solution:
1. On your TV, start searching for devices (Settings → Screen Mirroring → Search).
2. On your phone, manually add the TV via Add a device in the settings Wi-Fi.
❓ How do I connect my phone to my TV via USB?

To connect via USB You will need:

• Cable USB-C → USB-A (or MicroUSB → USB-A for old phones).
• TV with support MHL or Smart View (majority Samsung And LG after 2017).

Instructions:

1. Connect the cable to your phone and USB-TV port (usually marked as HDMI (MHL)).
2. On your phone, select the mode File transfer or MHL.
3. On your TV, select the signal source USB or MHL.

If the screen is not duplicated, try using an adapter USB-C → HDMI (for example, for Samsung DeX).