Wi-Fi Works on PC, But Not on Android: Causes and Solutions

On the phone with Android Wi-Fi either doesn't appear in the list of available networks at all, connects without internet access, or constantly drops the connection—even though a laptop or PC works reliably with the same access point. The cause could be either router settings (incompatible network mode, MAC address restrictions, channel congestion) or smartphone software issues (outdated firmware, app conflicts, Wi-Fi module errors on specific models, for example, Xiaomi or SamsungBefore resetting your settings or taking your phone to a service center, check the basic settings: reboot your router, enable airplane mode on your smartphone for 30 seconds, and ensure that VPNs or proxies blocking traffic aren't enabled in your network settings.

The problem is rarely random. More often than not, it is related to router settings, features of Android firmware or hardware limitations of the smartphone. In this article, we will discuss all possible reasons - from a banal IP address failure to a conflict between Wi-Fi 6 standards and outdated security protocolsYou will receive a diagnostic checklist and step-by-step instructions that work on 90% of devices (from Samsung Galaxy to Xiaomi Redmi).

Important: If Wi-Fi is not working only on one phone, and other gadgets (including other smartphones) connect normally - the problem is almost certainly in the settings Android or the Wi-Fi hardware module. If the network drops on all devices except the PC, the router or ISP is to blame.

1. Checking basic settings: what to do first

Before delving into your router settings or resetting your smartphone, follow these simple steps. They solve the problem in 30% of cases:

  • 🔄 Restart your router and phoneUnplug the router for 30 seconds, then plug it back in. On your phone, hold down the power button and select "Restart."
  • 📶 Check the airplane modeSometimes it's activated accidentally (for example, through the Quick Settings panel). Open the notification shade and make sure the airplane icon is not highlighted.
  • 🔒 Make sure you are entering the correct password.On . Android If you enter a password incorrectly, the network may "disappear" from the list of available networks. Try reconnecting by entering the characters manually (not using the clipboard).
  • 📱 Check MAC address restrictionsSome routers block new devices. Go to the router's web interface (usually at 192.168.0.1 or 192.168.1.1) and look at the list of allowed MAC addresses.

If Wi-Fi still isn't working after these steps, proceed to the next section. But first, answer this question:

📊 How long have you been having problems with Wi-Fi on your phone?
Today/yesterday
A week ago
More than a month
Constantly, from the moment I bought the phone

Advice for owners Xiaomi, Realme And Oppo: These brands often have the Smart Connect feature enabled (Settings → Wi-Fi → Advanced → Smart connection), which automatically switches to mobile data when the signal is weak. Disable it if you want your phone to stay connected to Wi-Fi even at low speeds.

2. Wi-Fi Standards Conflict: Why Your Phone Can't See the 5 GHz Network

Modern routers broadcast simultaneously in two ranges: 2.4 GHz (long-range but slow) and 5 GHz (fast, but with a smaller coverage area). Computers typically connect to 5 GHz automatically, but smartphones don't. Here's why:

  • 📡 Outdated Wi-Fi modulePhones older than 2018 (eg. Samsung Galaxy S7 or Huawei P10) may not support 802.11ac (Wi-Fi 5) or 802.11ax (Wi-Fi 6).
  • 🔧 The 5 GHz band is disabled on the router.Some providers disable it by default "for stability."
  • 🛡️ Incompatible security settingsFor example, if the router has WPA3, and the phone only supports WPA2.

How to check:

  1. Go to your router settings (instructions for your model are on the sticker on the back of the device).
  2. Find the section Wi-Fi or Wireless network.
  3. Check if the range is enabled 5 GHzIf yes, check what safety standard is used (WPA2-PSK usually works everywhere).
  4. If your phone does not see the 5 GHz network, try manually specifying the channel (for example, 36 or 48) instead of the regime Auto.
Wi-Fi standard Range Max. speed Support on Android
802.11n (Wi-Fi 4) 2.4 GHz 600 Mbps All phones
802.11ac (Wi-Fi 5) 5 GHz 3.5 Gbps Since 2015
802.11ax (Wi-Fi 6) 2.4 + 5 GHz 9.6 Gbps Since 2019

Critical error: If your phone sees the network, but does not connect to it with the error "Authentication", most likely, the router is enabled WPA3, but the phone doesn't support it. Switch to WPA2-PSK or mixed mode WPA2/WPA3.

3. IP address issues: DHCP not providing settings

If your phone connects to Wi-Fi but the internet doesn't work (the "!IP address conflictThis happens when:

  • 🔢 The router cannot assign an IP address to the phone (the DHCP service is disabled or overloaded).
  • 📱 The phone has a manually assigned static IP address that conflicts with other devices.
  • 🛡️ The router or ISP's firewall is blocking traffic from the phone.

How to fix:

  1. Open on your phone Settings → Wi-Fi.
  2. Click on your network name and select Delete (or Forget Network).
  3. Reconnect. If that doesn't help, try manual settings:
  4. On the same network, select Advanced (or IP Settings).
  5. Install DHCP (and not "Static IP").

☑️ Checking DHCP on the router

Completed: 0 / 4

If the problem persists, try manually entering the IP:

IP address: 192.168.0.105

Gateway: 192.168.0.1


Subnet mask: 255.255.255.0


DNS: 8.8.8.8 (or 1.1.1.1)

⚠️ AttentionIf the internet works after manually setting the IP address, but then fails again after a while, the problem is with the router. Its firmware may be resetting DHCP settings. Update your router's firmware (instructions are available on the manufacturer's website).

4. Android firmware failures: network reset and safe mode

Sometimes it's not the network's fault, but the phone itself. For example:

  • 🤖 Wi-Fi module failure after the update Android (especially relevant for Samsung One UI And MIUI).
  • 📱 Application conflict, which manage the network (VPN, optimizers, antiviruses).
  • 🔄 Corrupted network settings after resetting or transferring data.

What to do:

  1. Restart your phone in safe mode:
    • Hold down the power button.
    • Press and hold "Power off" (on some phones, "Restart").
    • Select "Safe Mode".

    If Wi-Fi works in Safe Mode, a third-party app is to blame. Uninstall any recently installed apps (especially VPNs or internet boosters).

  2. Reset network settings:
    • Open Settings → System → Reset.
    • Select "Reset Wi-Fi, mobile network, and Bluetooth settings."
⚠️ Attention: This will delete all saved networks and passwords!
  • Update the firmware:
    • Go to Settings → Software Update.
    • If there is an update, install it.
    What should I do if Wi-Fi still doesn't work after resetting my network?

    If resetting doesn't help, try a full factory reset. Back up your data before doing this! After resetting, your phone will be as good as new—this solves 99% of Wi-Fi software issues.

    For owners Xiaomi: if after the update MIUI Wi-Fi is gone, try rolling back to the previous firmware version via Settings → About phone → MIUI version (tap the version 10 times to open the developer menu, then select "Package update").

    5. Hardware problems: when the phone itself is to blame

    If none of the previous methods helped, the problem may be in iron:

    • 📡 The Wi-Fi module is damaged (for example, after a fall or exposure to moisture).
    • 🔋 Weak antenna signal (especially on cheap phones).
    • 🔌 Faulty connector (if the phone was disassembled for repair).

    How to check:

    1. Connect your phone to a different Wi-Fi network (for example, at a cafe or at a friend's place). If it works there, the problem is with your router or settings.
    2. Try turning it on modem mode on your phone and connect another device (tablet or laptop) to it. If the connection doesn't work, the Wi-Fi module is faulty.
    3. Check to see if the phone is getting hot near the top (where the antenna is usually located). Overheating may indicate a short circuit.

    If you suspect a hardware failure:

    • 🛠️ Contact a service center (especially if the phone is under warranty).
    • 💰 Check the repair cost - sometimes it is cheaper to buy a new phone than to change the Wi-Fi module (for example, on Samsung Galaxy A-series or Redmi Note).
    ⚠️ AttentionIf your phone has been dropped or gotten wet, do not attempt to disassemble it yourself! This may cause a short circuit. Service centers use specialized tools and diagnostic equipment.

    6. Router Features: MTU, Channels, and Signal Strength

    Sometimes the problem lies in fine-tuning the router, which don't affect PCs but disrupt connections on phones. Here's what to check:

    Parameter Optimal value What happens if it's not like this?
    MTU 1472–1500 Packets are fragmented, the connection is broken
    Channel width (5 GHz) 20/40 MHz Unstable signal on older phones
    Transmission power 100% Weak signal in distant rooms
    802.11 mode Mixed (b/g/n/ac) The phone does not see the network or connects at a low speed.

    How to change settings:

    1. Go to the router's web interface (usually 192.168.0.1 or 192.168.1.1).
    2. Find the section Wi-Fi or Wireless network.
    3. Check the parameters in the table above. If you are unsure, reset the router to factory settings (button Reset on the back panel).

    For advanced users: if you have a router based on OpenWRT or DD-WRT, try specifying the value manually MTU: 

    uci set network.lan.mtu=1472

    uci commit
    

    reboot

    This may solve the problem with connection drops on Android 10+.

    7. The impact of VPN, antiviruses and energy saving

    Third-party applications often interfere with network operation. Particularly dangerous are:

    • 🔒 VPN clients (For example, NordVPN, ProtonVPN). They can redirect all traffic through their servers, even when turned off.
    • 🛡️ Antiviruses (Avast, Kaspersky). Their network security modules sometimes block Wi-Fi.
    • 🔋 Power saving modesOn . Samsung And Huawei They can turn off Wi-Fi in the background.

    How to check:

    1. Open Settings → Applications.
    2. Find your VPN or antivirus, click Stop and Disable.
    3. Check if the Internet is available.
    4. If yes, delete or reconfigure the application.

    For Xiaomi And Redmi:

    • Go to Settings → Battery & performance → Power saving mode.
    • Turn off "Background Restriction" for apps that require internet access.

    8. When the provider is to blame: blocking and restrictions

    Although rare, it can happen that your ISP blocks connections for certain devices. This can happen if:

    • 📡 You are using public Wi-Fi (in a hotel, airport), where the number of connected gadgets is limited.
    • 🔒 Yours MAC address blocked by the provider (for example, for violating the rules).
    • 📶 The provider applies DPI (deep packet inspection) and blocks traffic from phones.

    How to check:

    1. Connect your phone to mobile data (3G/4G/5G). If it works, the problem is definitely Wi-Fi.
    2. Call your provider's support team and check if there are any MAC address blocks.
    3. Try it clone MAC address From a computer (if your provider restricts access to a specific device). To do this:
      • Find out your PC's MAC address (in Windows: ipconfig /all (in the command line).
      • In the router settings, find the "Clone MAC address" option and enter the address from your PC.
    ⚠️ AttentionIf you're connected to a corporate or school network, the administrator may have manually blocked your phone. In this case, the only solution is to contact your IT department.

    FAQ: Frequently Asked Questions

    Why does Wi-Fi work on iPhone but not on Android?

    iPhone And Android Network settings are handled differently. Most often, the problem lies in:

    • Incompatibilities of Wi-Fi standards (e.g. iPhone supports WPA3, A Android - No).
    • MAC address restrictions (some routers block non-iOS devices).
    • Power saving settings on Android (they can turn off Wi-Fi in the background).

    Solution: Check your router's security settings and disable power saving for Wi-Fi on your phone.

    Can a virus block Wi-Fi on a phone?

    Yes, but extremely rarely. Typically, "viruses" are:

    • VPN programs that redirect traffic.
    • Fake "optimizers" that break network settings.
    • Adware that overloads the network.

    What to do:

    1. Remove suspicious applications.
    2. Reset network settings (Settings → System → Reset).
    3. Install antivirus (Malwarebytes or Dr.Web Light) and scan your phone.
    Why does Wi-Fi turn off when my phone screen is off?

    This is a feature power saving mode on AndroidTo fix:

    1. Go to Settings → Battery → Power saving mode.
    2. Disable the option "Turn off Wi-Fi when the screen is locked" (the name may differ).
    3. For Xiaomi: Settings → Battery → Mode selection → Performance.

    If there is no option, try disabling the adaptive battery (Settings → Battery → Adaptive battery).

    How do I know if my phone supports 5GHz Wi-Fi?

    There are several ways:

    1. View specifications on the manufacturer's website (look for support 802.11ac or 5 GHz).
    2. Check in settings:
      • Open Settings → Wi-Fi.
      • Click on your network name.
      • If there is a label “5 GHz” or “802.11ac”, the phone supports this range.
  • Install the app WiFi Analyzer (shows all available networks and their frequencies).

    • List of phone numbers no 5 GHz support:

    • Samsung Galaxy J2, J3 (2016–2017).
    • Xiaomi Redmi 4A, Redmi 5A (budget models).
    • Most phones are before 2015.
    What to do if nothing helps?

    If you've tried all the methods, but your phone's Wi-Fi still isn't working, there are some drastic measures left:

    1. Reset your phone to factory settings (don't forget to make a backup!).
    2. Update your router firmware (download the latest version from the manufacturer's website).
    3. Buy a new router (If the current one is more than 5 years old, it may not support modern standards).
    4. Contact the service to diagnose the phone's Wi-Fi module.

    If the problem appeared after the update Android, check the forums (eg 4PDA) - perhaps this is a known bug and there is a temporary solution.

    📖 Read also

    How to View Wi-Fi Password on Samsung: 5 Methods for Android Step-by-step instructions on how to find out the saved Wi-Fi password on Samsung Galaxy phones (A54, S23, How to view the Wi-Fi password on a Redmi: 5 ways Detailed instructions: how to find the Wi-Fi password on Redmi, Xiaomi, and POCO. Resetting the router, QR code, and syncing Wi-Fi network access is blocked on my phone: why and what to do A detailed analysis of the "Network access denied" error on Android and iPhone. Effective solutions How to Connect to Wi-Fi on iPhone Without a Password: 7 Working Methods Forgot your Wi-Fi password? Learn legal and secure ways to connect your iPhone to the network without entering your password. How to Boost Wi-Fi Speed ​​on Your Samsung Phone: A Complete Guide Learn how to speed up Wi-Fi on your Samsung Galaxy. Effective methods for configuring DNS, 5GHz frequency, and resetting How to find your WiFi password on Android without root: all the methods Detailed instructions on how to view saved WiFi passwords on Android without root access.