Why Wi-Fi Stopped Working on Android: A Complete Diagnosis and Repair

You turned on Wi-Fi on a smartphone, but the internet won't connect—or the network isn't showing up in the list at all? This problem is familiar to millions of users. Android, and its causes can be hidden in the phone settings, the router, or even a physical failure of the module. In this article, we'll look into All possible Wi-Fi shutdown scenarios on Android devices (including 2020–2026 models), from trivial failures to complex hardware malfunctions.

It's important to understand: if the problem arose suddenly, it's most likely due to software or settings. However, if Wi-Fi stopped working after a drop, water damage, or repair, it's time to check the hardware. We've structured this article so you can quickly find a solution for your situation: from simple checks to in-depth diagnostics.

Don't rush to take your phone to a service center—in 80% of cases, the problem can be fixed yourself in 5-15 minutes. Let's start with the most obvious.

1. Checking basic settings: router and phone

Before digging deeper, make sure the problem isn't trivial. Start with the router:

• 🔌 Router power supply: Check that the indicators on the case are lit (especially Power And Wi-Fi). If only blinks Power, the firmware may be frozen - a reboot will help (pull the plug for 30 seconds).
• 📶 Network operating mode: some routers (eg. TP-Link Archer C6 or Keenetic) can automatically turn off Wi-Fi on a schedule. Go to the router's web interface (192.168.0.1 or 192.168.1.1) and check the section Wireless → Schedule.
• 🔒 MAC address blocking: if filtering is enabled in the router settings MAC, your phone may have been blacklisted. Check the list of approved devices in Wireless → MAC Filtering.

Now let's move on to the phone:

• ✈️ Airplane mode: Even if the icon is not lit, sometimes the mode is activated by software (for example, after an update). Check in the notification shade or in Settings → Connections → Airplane Mode.
• 🔄 Restarting the device: It's trivial, but it works. Hold down the power button and select RebootThis will clear temporary errors in the Wi-Fi module.
• 📱 Energy saving: on some phones (eg. Xiaomi or Samsung) Aggressive power saving modes may disable Wi-Fi in the background. Check in Settings → Battery → Power saving mode.

⚠️ AttentionIf Wi-Fi works after rebooting the router, but then disappears again after a few hours, the problem may be overheating. Check its temperature (normal: up to 50°C) and make sure the ventilation holes are not blocked.

2. Resetting network settings: when it helps

If basic checks fail, the next step is to reset your phone's network settings. This will delete all saved Wi-Fi networks and passwords, as well as reset mobile data and Bluetooth settings. Don't be afraid: your data (photos, contacts) will not be affected.

Instructions for most Android devices (may differ slightly on EMUI from Huawei or One UI from Samsung):

1. Open Settings → System → Reset (or General settings → Reset).
2. Select Reset network settings (not to be confused with Factory reset!).
3. Confirm the action (you may be asked to enter a PIN or pattern).
4. After rebooting, try connecting to Wi-Fi again.

If the network still doesn't connect after the reset, try adding it manually:

1. Go to Settings → Wi-Fi.
2. Click Add a network.
3. Enter the network name (SSID), security type (WPA2-PSK or WPA3) and password.
4. Save and connect.

⚠️ Attention: On some firmware (for example, MIUI 14+) after resetting the network the option may disappear Additionally in the Wi-Fi settings. In this case, try updating the firmware or using the app WiFi Analyzer for diagnostics.

3. Problems with firmware and updates

One of the most insidious reasons for Wi-Fi not working is Crashes after Android updateThis is especially true for devices with custom firmware (for example, LineageOS) or for phones that have received a major update (for example, with Android 12 on Android 13).

Symptoms of a firmware bug:

• Wi-Fi turns on but doesn't find any networks.
• The network is found, but when connecting it says Saved or Authentication... and does not connect.
• After connecting, the Internet works for 1–2 minutes, then it disconnects.

Solutions:

1. Roll back the update (if the problem appeared immediately after the update). To do this:
   1. Go to Settings → System → System Update.
   2. Click on the three dots in the upper right corner and select Delete the last update (not available on all devices).
2. Reset network settings (already described above).
3. Install the patchSometimes manufacturers release hot fixes for critical bugs. Check for updates manually.
4. Reflash your phone (extreme case). If you're not an experienced user, it's best to contact a service center.

For devices Samsung With One UI There's a caveat: after updating, the Wi-Fi certificate may be lost. In this case, a reset via Settings → General Settings → Reset → Reset Certificates.

How to check if the firmware is to blame?

If Wi-Fi doesn't work on any network (including public hotspots), but Bluetooth and mobile data are working fine, there's a 90% chance the problem is firmware. Try connecting another phone to the same router; if it connects, your device is at fault.

4. Hardware faults: how to diagnose

If software methods don't help, it's time to think about physical damageThe Wi-Fi module in a smartphone can fail for several reasons:

• 💧 Moisture ingress: Even if the phone has not been submerged, condensation or high humidity can oxidize the module contacts.
• 🤕 Hit or fall: The Wi-Fi chip is soldered to the motherboard, and strong vibration may damage the soldering.
• ⚡ Overheat: If the phone heats up frequently (for example, while playing games), this could damage the module.
• 🔧 Poor quality repairs: After replacing the screen or battery, the Wi-Fi antenna cable may have been damaged.

How to check for hardware failure:

1. Check Bluetooth operation: If both Wi-Fi and Bluetooth are not working, the problem is most likely in the general module (on most phones they are combined).
2. Use test codes:

   ##4636##

   In the menu that opens, select Wi-Fi Information. If the field Wi-Fi status empty or showing Unavailable — the module is faulty.

3. Connect to another network: If the phone does not see any network (including public ones), this is a sign of hardware failure.

If diagnostics confirm a module malfunction, there are two options:

• 🔧 Replacing the Wi-Fi module (cost: from 1,500 to 5,000 rubles depending on the model).
• 📱 Using a USB/Type-C Wi-Fi adapter (For example, TP-Link TL-WN725N). Suitable if the phone supports it. OTG.

⚠️ Attention: On some phones (eg. iPhone or flagship SamsungThe Wi-Fi module is soldered onto the motherboard. In this case, repairs will cost more—up to 10,000 rubles.

5. Conflicts with applications and VPNs

Sometimes Wi-Fi stops working because conflicts with installed applications. Most often, the culprits are:

• 🛡️ VPN clients (For example, NordVPN, ProtonVPN): they can block connections to local networks.
• 🔒 Antiviruses (For example, Kaspersky, Avast): some of them scan traffic and can “break” the connection.
• 🎮 Game accelerators (For example, Game Turbo on Xiaomi): They optimize the network for gaming, but sometimes they mess up regular Wi-Fi.
• 📱 Apps for saving traffic (For example, Datally from Google).

How to find and resolve a conflict:

1. Start your phone in safe mode:
   1. Press and hold the power button, then hold your finger on Turn off.
   2. A suggestion to go to will appear Safe mode — confirm.
   3. Only system apps work in this mode. If Wi-Fi works, one of the installed apps is to blame.
2. Check your VPN settings:
   1. Go to Settings → Connections → Other networks → VPN.
   2. Disconnect all active connections.
   3. If you are using a VPN app, uninstall it and restart your phone.
3. Disable battery optimization for network apps:
   1. Go to Settings → Applications.
   2. Find an app (eg. Chrome or YouTube).
   3. Select Battery → Battery Optimization → Unlimited.

If the problem goes away in Safe Mode but returns after booting normally, uninstall apps one by one, starting with the most recently installed ones. Pay special attention to apps that request access to VPN settings or changing system settings.

6. IP addressing and DHCP issues

If your phone connects to Wi-Fi, but the internet doesn't work (the Wi-Fi icon is on, but the pages don't load), the problem may be incorrect assignment of IP addressThis often happens if:

• The router is broken and is not giving out an IP address. DHCP.
• The phone has a static IP address that conflicts with the network.
• There are too many devices on the network and the router has exhausted its IP address pool.

How to fix:

1. Reboot your router - this will reset the table DHCP.
2. Check the IP settings on your phone:
   1. Go to Settings → Wi-Fi.
   2. Click on your network → Network Management → Advanced (or IP settings).
   3. Make sure it's worth it DHCP (and not Static).
3. Set a static IP manually (If DHCP doesn't work):
   1. In the same network settings, select Static.
   2. Enter an IP address from your network range (e.g. 192.168.1.100, if the router has an IP 192.168.1.1).
   3. Please specify Gateway (router IP), Subnet mask (255.255.255.0) And DNS (For example, 8.8.8.8 And 8.8.4.4 for Google DNS).
4. Check for IP conflicts:
   1. Connect your phone to the router via cable (via USB-OTG adapter if there is no port Ethernet).
   2. Go to the router's web interface and look at the list of connected devices (DHCP Clients List).
   3. If you see duplicate IP addresses, manually change the IP address on your phone.

If after these manipulations the Internet works, but after some time it disappears again, the problem may be in DHCP lease. Try increasing the lease time in the router settings (section DHCP Settings).

7. Problems with specific phone models

Some models Android-devices have common Wi-Fi problems, related to hardware or firmware. Here are the most common cases:

For devices Samsung With One UI There's a separate bug: after an update, the Wi-Fi security certificate may be lost. This can be fixed as follows:

1. Go to Settings → Biometrics and security → Other security settings.
2. Select Clear certificates.
3. Restart your phone and try connecting again.

If you have a phone with MediaTek-processor (for example, Redmi or Realme), try disabling the function Wi-Fi Direct - It sometimes conflicts with regular Wi-Fi.

8. When to contact the service center

If you've tried all the methods in this article and your Wi-Fi still isn't working, it's time to admit it: the problem hardware or requires professional intervention. Contact our service if:

• 📡 The phone doesn't detect it not a single one Wi-Fi network (including public ones).
• 🔌 Wi-Fi turns on, but then immediately turns off with an error. Connection error.
• 🔥 The phone gets hot in the antenna area (upper part of the case).
• 🛠️ Have you already tried resetting the settings, flashing the phone, and changing the router.

What to do before visiting the service center:

1. Back up your data (in case a hard reset is required).
2. Write down your phone's IMEI (type *#06#).
3. Check whether the breakdown entitles you to warranty repairs. (if the phone is under warranty).
4. Check reviews about the service center — Some workshops “force” unnecessary repairs.

Cost of repairing a Wi-Fi module:

• Budget phones (Redmi, Nokia): 1,500–3,000 rubles.
• Middle segment (Samsung A-series, Huawei P-series): 3,000–6,000 rubles.
• Flagships (Samsung S/Note, iPhone): 6,000–15,000 rubles (due to the complexity of disassembly).

⚠️ AttentionIf your phone is under warranty, do not open it yourself—this will void the warranty. Contact the brand's authorized service center.

FAQ: Frequently asked questions about Wi-Fi not working on Android

Why is Wi-Fi working but there is no internet?

This is a typical problem with DHCP or DNS. Try:

1. Reboot the router.
2. Set a static IP on your phone (as described in section 6).
3. Change DNS to 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare).

If that doesn't help, check if the router is blocking your phone (section Parental Control or Access Control).

The Wi-Fi connects, but the speed is very slow. What's wrong?

The reasons may be different:

• 📶 The Wi-Fi channel is overloaded: change the channel in the router settings (for example, from Auto on 6 or 11 for 2.4 GHz).
• 🔄 Speed ​​limit on the router: check QoS or Bandwidth Control.
• 📱 Background updates: Turn off auto-update of apps in Google Play.
• 🛡️ VPN or proxy: they can limit the speed.

Also try connecting to a 5 GHz network (if your router supports it) - it's less congested.

Wi-Fi stopped working after an Android update. How do I downgrade?

Options:

1. Delete the last update (if available): Settings → System → System update → Uninstall latest update.
2. Reset your phone to factory settings (will delete all data!).
3. Manual flashing through Fastboot or Recovery (requires skills).

If you're unsure, contact your service center. Rolling back the firmware may brick your phone (for example, on Samsung With Knox).

My phone connects to Wi-Fi, but websites won't open. What should I do?

Most likely the problem is with DNS. Try:

1. Change DNS in Wi-Fi settings (for example, to 8.8.8.8).
2. Disable VPN or proxy.
3. Check if your router is blocking your internet access (section Firewall or Security).

If that doesn't help, try connecting to a different network (for example, via a mobile hotspot).

Is it possible to repair a Wi-Fi module yourself?

Theoretically yes, but:

• 🔧 A soldering station and experience with microelectronics are required.
• 📱 On most phones, the module is soldered to the motherboard.
• ⚠️ Risk of damaging the phone (for example, tearing off contacts).

If you don't have experience, it's best not to take any risks. Only phones with replaceable modules (for example, some models) are suitable for DIY repairs. Xiaomi or Samsung older than 2018).