Android system updates are designed to improve security, stability, performance, device compatibility, and functionality. However, occasionally a phone or tablet may develop network-related problems immediately after installing an Android update.

One of the more common complaints is:

“Wi-Fi was working before the Android update, but now it is not working.”

The symptoms can vary significantly. The device may refuse to enable Wi-Fi, fail to detect networks, repeatedly disconnect, show Connected without internet, remain stuck on Obtaining IP address, or reject a previously working Wi-Fi password.

In many cases, the Wi-Fi router itself is perfectly functional and other devices continue to connect normally.

This article explains the possible causes and provides a systematic troubleshooting procedure, starting with safe basic fixes and progressing to advanced solutions.

Common Wi-Fi Problems After an Android Update

After updating Android, users may experience one or more of the following:

• Wi-Fi does not turn on.
• Wi-Fi turns itself off automatically.
• Phone cannot find nearby Wi-Fi networks.
• Previously saved Wi-Fi network does not connect.
• Wi-Fi shows Saved but does not connect.
• Device remains stuck at Obtaining IP address.
• Android displays Authentication problem.
• Android shows Connected without internet.
• Internet does not work despite Wi-Fi showing connected.
• Wi-Fi disconnects repeatedly.
• Wi-Fi becomes unusually slow.
• Wi-Fi works only after restarting the phone.
• 5 GHz Wi-Fi network disappears.
• 2.4 GHz works but 5 GHz does not.
• Certain routers no longer connect.
• Wi-Fi works in Safe Mode but not normally.
• Wi-Fi calling or hotspot behavior changes after the update.

The exact wording varies depending on Android version and manufacturer.

Why Can Wi-Fi Stop Working After an Android Update?

An Android update changes many components of the operating system. Wi-Fi problems therefore do not necessarily indicate defective Wi-Fi hardware.

Possible causes include:

1. Temporary Android Networking Glitch

Network-related services may not initialize correctly during the first boot following an update.

A simple restart can sometimes resolve the problem.

2. Corrupted or Incompatible Saved Wi-Fi Configuration

The existing saved network profile may no longer work correctly with the updated networking components.

Deleting and recreating the connection can resolve this.

3. Network Settings Conflict

Existing Wi-Fi, mobile network, Bluetooth, VPN, DNS, or related network settings can occasionally conflict with changes introduced by the update.

4. Router Compatibility Issue

A firmware or security change in Android can expose compatibility problems with an older router.

This is particularly relevant to:

• WPA/WPA2/WPA3 compatibility
• Wi-Fi 5/6/6E/7 implementations
• 2.4 GHz and 5 GHz bands
• Router channel selection
• DHCP
• IPv6
• MAC filtering
• Private/randomized MAC addresses

5. DHCP or IP Address Problem

The phone may detect the router but fail to obtain a valid IP address.

You may see:

Obtaining IP address...

followed by a connection failure.

6. Private DNS or VPN Conflict

VPN applications, ad blockers, firewalls, security software, DNS filtering applications, and Private DNS configurations can interfere with connectivity after an update.

7. Application Compatibility Problem

A third-party application with networking privileges may behave incorrectly with the new Android version.

8. Android Update Bug

Occasionally, a particular Android build contains a Wi-Fi-related software bug.

In such situations, a later security patch or maintenance update may be required.

9. Wi-Fi Hardware or Antenna Problem

If troubleshooting fails completely, there could also be a hardware problem involving the Wi-Fi/Bluetooth chipset, antenna, motherboard, or related circuitry.

The timing may simply coincide with the Android update.

Fix 1: Restart the Android Device

Start with the simplest solution.

1. Press and hold the Power button.
2. Select Restart.
3. Allow Android to boot completely.
4. Wait approximately one minute.
5. Enable Wi-Fi.
6. Try connecting again.

A restart reloads Android networking services and drivers.

If Wi-Fi works normally afterward, the issue may have been a temporary post-update initialization problem.

Fix 2: Turn Wi-Fi Off and Back On

Open:

Settings → Network & Internet / Connections → Wi-Fi

Turn Wi-Fi Off.

Wait approximately 15–30 seconds.

Turn it On again.

The exact menu name varies between Samsung, Google Pixel, OnePlus, Motorola, Xiaomi, OPPO, vivo, Nothing, Realme, and other manufacturers.

Fix 3: Toggle Airplane Mode

Airplane Mode can force Android's wireless interfaces to reinitialize.

1. Enable Airplane Mode.
2. Wait approximately 30 seconds.
3. Disable Airplane Mode.
4. Enable Wi-Fi.
5. Reconnect to the network.

This is particularly useful for temporary radio or networking problems.

Fix 4: Restart the Wi-Fi Router

Do not assume that Android is necessarily responsible just because the problem appeared after an update.

Restart the router as well.

1. Turn the router off.
2. Disconnect its power supply.
3. Wait approximately 30–60 seconds.
4. Reconnect power.
5. Allow the router to boot fully.
6. Try connecting the Android device.

Important: Avoid pressing the router's physical Reset button. A factory reset can erase ISP and Wi-Fi configuration.

Fix 5: Test Wi-Fi on Another Device

Connect another phone, laptop, tablet, or computer to the same Wi-Fi network.

If no device has internet

The problem is probably related to:

• Router
• ISP connection
• Broadband modem/ONT
• DNS
• Router DHCP configuration

If every other device works

The Android device becomes the primary suspect.

This simple test can save considerable troubleshooting time.

Fix 6: Forget the Wi-Fi Network and Reconnect

This is one of the most effective fixes after an Android update.

Go to:

Settings → Wi-Fi → Saved Networks

or select the problematic network.

Tap:

Forget

Then reconnect and enter the Wi-Fi password again.

This recreates the network profile instead of continuing to use potentially incompatible saved settings.

Fix 7: Verify the Wi-Fi Password

If Android displays:

Authentication problem

verify the password carefully.

Remember that Wi-Fi passwords are case-sensitive.

For example:

Office@2026

and

office@2026

are different passwords.

Forgetting the network and entering the password again is recommended.

Fix 8: Check Whether Android Is Receiving an IP Address

Open the connected Wi-Fi network's details.

Look for information such as:

• IP address
• Gateway
• DNS
• Subnet
• Link speed

Typical private IPv4 addresses include:

192.168.1.x

192.168.0.x

10.x.x.x

If the device repeatedly remains at Obtaining IP address, investigate the router's DHCP service.

Possible causes include:

• DHCP service malfunction
• DHCP address pool exhausted
• Router firmware problem
• Duplicate IP address
• MAC filtering
• Network configuration conflict

Restarting the router is often the safest first step.

Fix 9: Check Randomized MAC Address / Device MAC

Modern Android versions can use a randomized MAC address for privacy.

Some corporate, office, hotel, school, or MAC-filtered networks may expect the physical device MAC address.

Open the affected Wi-Fi network's settings and look for an option similar to:

Privacy

You may see:

• Randomized MAC
• Device MAC

If the router or network uses MAC filtering, try Device MAC.

Do not disable MAC randomization unnecessarily on normal public networks. It provides useful privacy protection.

Fix 10: Temporarily Disable VPN

If you use a VPN, disconnect it temporarily.

Examples include:

• Corporate VPN
• Personal VPN
• Firewall VPN
• Ad-blocking VPN
• Antivirus web protection
• DNS filtering VPN

Restart the phone and test Wi-Fi again.

If connectivity returns, update or reconfigure the VPN application before enabling it again.

Fix 11: Check Private DNS

Android supports encrypted Private DNS.

Go to a location similar to:

Settings → Network & Internet → Private DNS

Depending on the device, test:

Automatic

or temporarily:

Off

If a custom Private DNS hostname was configured previously, it may be responsible for the apparent internet failure.

If changing Private DNS fixes the problem, investigate the configured DNS provider rather than permanently disabling the feature without determining the cause.

Fix 12: Disable Third-Party Firewall or Network Security Apps Temporarily

Applications capable of filtering network traffic may interfere with connectivity after a major Android upgrade.

Examples include:

• Firewalls
• Antivirus network protection
• Parental-control applications
• DNS filters
• Ad blockers
• VPN-based security tools
• Corporate network agents

Temporarily disable the relevant application and test Wi-Fi.

If this solves the problem, install its latest compatible version.

Fix 13: Test Another Wi-Fi Network

Connect the Android phone to another network.

For example:

• Another home router
• Office Wi-Fi
• A trusted mobile hotspot
• Another broadband connection

If the phone works on another Wi-Fi network

The issue is probably related to the original router or its compatibility/configuration.

If the phone fails on every Wi-Fi network

The problem is more likely on the Android device itself.

This is an important diagnostic distinction.

Fix 14: Test 2.4 GHz and 5 GHz Separately

Many routers support multiple frequency bands.

Common bands include:

• 2.4 GHz
• 5 GHz
• 6 GHz on supported hardware

If your router provides separate network names, test both 2.4 GHz and 5 GHz.

For example:

OfficeWiFi-2G

OfficeWiFi-5G

If 2.4 GHz works but 5 GHz does not, possible causes include:

• Router channel compatibility
• Regional channel restrictions
• DFS channels
• Router firmware
• Band configuration
• Android update compatibility issue

Fix 15: Check Router Security Mode

Modern Android devices work best with current Wi-Fi security standards.

Common configurations include:

• WPA2-Personal
• WPA3-Personal
• WPA2/WPA3 transitional mode

Very old or unusual router security settings can cause compatibility problems.

Avoid insecure configurations such as:

• WEP
• Open Wi-Fi without authentication
• Obsolete WPA configurations

Before changing router security settings, ensure you understand the impact because connected devices may need to be reconfigured.

Fix 16: Check Router DHCP

If Android repeatedly shows:

Obtaining IP address

check whether DHCP is enabled on the router.

A typical home or small-office network normally has DHCP enabled on the router.

Also verify that the DHCP address pool has sufficient addresses for all connected devices.

For example:

192.168.1.100 – 192.168.1.200

provides substantially more usable addresses than an extremely small pool.

Do not modify DHCP settings unless you understand the network configuration.

Fix 17: Reset Network Settings

If basic troubleshooting fails, reset Android's network configuration.

Depending on the manufacturer, navigate to something similar to:

Settings → System → Reset options → Reset Wi-Fi, mobile & Bluetooth

or:

Settings → General management → Reset → Reset network settings

This may reset:

• Wi-Fi configuration
• Saved Wi-Fi networks
• Bluetooth pairing information
• Mobile network preferences
• Related network settings

The exact effect varies by manufacturer and Android version.

Important

Make sure you know important Wi-Fi passwords and can re-pair Bluetooth devices before proceeding.

After the reset:

1. Restart the phone.
2. Enable Wi-Fi.
3. Connect to the network again.
4. Test internet access.

Fix 18: Check for Another Android Update

If the problem started immediately after installing a particular Android version, check for another system update.

Go to:

Settings → System → Software Update

or the equivalent menu provided by the manufacturer.

Manufacturers may release subsequent updates containing fixes for connectivity issues discovered after a major release.

Also update Google Play system components where supported.

Fix 19: Update Applications

Open Google Play and install available application updates.

This is especially important for:

• VPN software
• Security software
• Device-management software
• Firewall applications
• DNS tools
• Carrier applications
• Networking utilities

An application built for an older Android version may not operate correctly after a major upgrade.

Fix 20: Boot Android Into Safe Mode

Safe Mode temporarily prevents most downloaded third-party applications from running.

The exact procedure varies by manufacturer.

On many devices, it involves opening the power menu and holding the Power off option until the Safe Mode prompt appears.

After entering Safe Mode:

1. Enable Wi-Fi.
2. Connect to the network.
3. Test internet connectivity.

If Wi-Fi works in Safe Mode

A third-party application is likely interfering.

Investigate recently installed or updated:

• VPN applications
• Antivirus software
• Firewalls
• Network optimizers
• Battery optimizers
• DNS applications
• Ad blockers
• Parental controls

Restart normally to exit Safe Mode.

Fix 21: Check Date and Time

Incorrect system time can cause secure internet services to fail even though Wi-Fi itself appears connected.

Open:

Settings → System → Date & Time

Enable:

Set time automatically

and, where appropriate:

Set time zone automatically

Then reconnect to Wi-Fi.

Fix 22: Check Whether Only Certain Apps Are Affected

Determine whether Wi-Fi is completely broken or only particular applications cannot access the internet.

Test:

• Web browser
• Google Play
• YouTube
• Email
• Messaging applications

If Chrome works but one specific application does not, the issue is probably not the Wi-Fi radio itself.

Check the affected application's:

• Network permissions
• Background data settings
• Battery restrictions
• VPN interaction
• Cache
• Updates

Fix 23: Check for a Captive Portal

Public Wi-Fi networks frequently require browser authentication.

Examples include:

• Hotels
• Airports
• Universities
• Cafes
• Hospitals
• Guest networks

Android may show Wi-Fi connected while internet access remains unavailable until the user accepts terms or signs in.

Open a browser and attempt to access a normal webpage. The network's sign-in page may appear.

Fix 24: Advanced Router Troubleshooting

If the Android phone works on other Wi-Fi networks but fails on one particular router, investigate the router.

Potential areas include:

• Router firmware
• DHCP
• WPA2/WPA3 configuration
• MAC filtering
• Access-control lists
• 2.4/5 GHz configuration
• Wi-Fi channels
• DFS channels
• Band steering
• Smart Connect
• IPv6
• DNS configuration

Change one setting at a time and document the original configuration before modifying anything.

For business networks, involve the network administrator instead of experimenting with production router settings.

Fix 25: Factory Reset – Last Software Option

If Wi-Fi stopped working immediately after an Android upgrade and every reasonable troubleshooting method has failed, a factory reset can sometimes eliminate corrupted configuration left behind during the upgrade.

Warning: A factory reset erases user data from the device.

Before proceeding, back up important information such as:

• Photos
• Videos
• Contacts
• Documents
• Messages where applicable
• Authenticator/2FA information
• Application data
• WhatsApp or other chat backups
• Important downloaded files

Also ensure that you know the Google account credentials associated with the phone.

After backing up, use the manufacturer's documented factory-reset procedure.

Important Diagnostic Tip: Test Wi-Fi Before Restoring Everything

After a factory reset, test Wi-Fi as early as practical during the clean configuration process.

If Wi-Fi works on the clean device but stops after applications/settings are restored, a restored application or configuration may be responsible.

If Wi-Fi still fails on multiple known-good networks immediately after a clean reset, hardware or firmware-level investigation becomes more important.

When Could It Be a Hardware Problem?

Suspect hardware if:

• Wi-Fi cannot be enabled at all.
• Wi-Fi switch remains disabled or immediately turns off.
• No networks are detected anywhere.
• Bluetooth also behaves abnormally.
• Factory reset does not resolve the issue.
• Multiple known-good routers fail.
• The phone was recently dropped.
• The phone suffered liquid exposure.
• The device was previously repaired.
• Wi-Fi signal is extremely weak even beside the router.

Possible hardware areas include:

• Wi-Fi/Bluetooth chipset
• Antenna
• Antenna connector
• Motherboard
• RF circuitry

Professional hardware diagnosis may be necessary.

Wi-Fi Connected but No Internet After Android Update

If Android says Wi-Fi is connected but internet access is unavailable, use this troubleshooting sequence:

1. Test another device on the same router.
2. Restart Android.
3. Restart the router.
4. Forget and reconnect to the Wi-Fi network.
5. Disable VPN temporarily.
6. Check Private DNS.
7. Verify automatic date and time.
8. Test another Wi-Fi network.
9. Reset network settings.
10. Check for Android and application updates.

This distinguishes internet-routing problems from actual Wi-Fi radio problems.

Wi-Fi Stuck on “Obtaining IP Address”

If Android remains stuck at:

Obtaining IP address

focus on:

• Router restart
• Forget/reconnect
• DHCP
• DHCP address pool
• MAC filtering
• Randomized MAC configuration
• Network settings reset
• Router firmware

Avoid manually assigning a static IP unless you understand the network's addressing scheme. An incorrect static configuration can create duplicate IP addresses or routing problems.

Wi-Fi Authentication Problem After Android Update

For an authentication error:

1. Forget the network.
2. Re-enter the password.
3. Restart the router.
4. Verify router security mode.
5. Check WPA2/WPA3 compatibility.
6. Test another Wi-Fi network.
7. Update router firmware where appropriate.
8. Reset Android network settings if necessary.

Wi-Fi Keeps Disconnecting After Android Update

If Wi-Fi connects but repeatedly drops:

• Restart the phone.
• Restart the router.
• Forget and reconnect.
• Disable VPN temporarily.
• Check battery optimization affecting network-related apps.
• Test 2.4 GHz and 5 GHz independently.
• Test another router.
• Update Android.
• Update router firmware.
• Reset network settings.

Testing another router is particularly valuable because it establishes whether the instability follows the phone or remains with one network.

Recommended Troubleshooting Order

For most users, the following order provides a good balance between effectiveness and safety:

Restart phone → Toggle Wi-Fi → Airplane Mode → Restart router → Test other devices → Forget Wi-Fi → Reconnect → Test another network → Disable VPN/Private DNS → Test 2.4/5 GHz → Reset network settings → Safe Mode → Check updates → Investigate router → Backup → Factory reset → Hardware diagnosis

Do not begin with a factory reset.

What You Should Avoid

Avoid the following unless you fully understand the consequences:

• Factory resetting the phone before backing up.
• Factory resetting the router unnecessarily.
• Installing unknown “Wi-Fi repair” APK files.
• Rooting the phone merely to fix Wi-Fi.
• Flashing unofficial firmware without proper knowledge.
• Manually changing IP/DNS settings randomly.
• Disabling router security permanently.
• Downgrading Android using unofficial firmware packages.

These actions can create additional problems and may lead to data loss or security risks.

Quick Troubleshooting Table

Problem	Likely Area	First Action
Wi-Fi won't turn on	Android/firmware/hardware	Restart phone
Network not visible	Band/channel/router	Test another network
Authentication problem	Password/security	Forget and reconnect
Obtaining IP address	DHCP	Restart router
Connected, no internet	Router/DNS/VPN/ISP	Test another device
Frequent disconnects	Router/app/firmware	Test another network
Only 5 GHz fails	Channel/band compatibility	Test 2.4 GHz
Works in Safe Mode	Third-party app	Identify conflicting app
Fails after network reset	Firmware/router/hardware	Test multiple networks
Fails after factory reset	Firmware/hardware	Seek technical diagnosis

Frequently Asked Questions (FAQ)

1. Why did my Wi-Fi stop working after an Android update?

The update may have changed networking components, security behavior, saved network compatibility, or interaction with third-party VPN/security software. It could also expose an existing router compatibility issue.

2. Will restarting my phone fix Wi-Fi?

Sometimes. A restart reloads Android networking services and is one of the safest first troubleshooting steps.

3. Why does my phone detect Wi-Fi but refuse to connect?

Possible causes include an incorrect password, corrupted saved profile, WPA2/WPA3 compatibility issue, DHCP problem, MAC filtering, or router configuration.

4. Why does Android say “Connected without internet”?

The phone has established a Wi-Fi connection to the router but cannot successfully reach the internet. Check the ISP, router, DNS, VPN, Private DNS, and other devices.

5. Why is Android stuck on “Obtaining IP address”?

The router may not be assigning an IP address correctly. Restart the router, forget/reconnect the network, and investigate DHCP configuration.

6. Will forgetting the Wi-Fi network delete my phone data?

No. It removes the saved configuration for that Wi-Fi network. You will normally need to enter its password again.

7. Does resetting network settings delete photos and applications?

Normally it does not erase personal files or applications, but it can remove saved Wi-Fi, Bluetooth, mobile-network, and related configuration. The exact behavior varies by manufacturer.

8. Should I factory reset my phone immediately?

No. A factory reset should generally be considered only after safer troubleshooting methods have failed and important data has been backed up.

9. Why does Wi-Fi work on other phones but not mine?

This suggests the router and internet connection are functioning and the issue is more likely specific to your Android device, its saved configuration, applications, or compatibility with that router.

10. Why does my Android phone work on another Wi-Fi network?

If the phone connects normally elsewhere, investigate the original router's DHCP, security mode, channel selection, MAC filtering, firmware, and band configuration.

11. Can a VPN cause Wi-Fi to show “No Internet”?

Yes. A malfunctioning or incompatible VPN can prevent internet traffic even though the underlying Wi-Fi connection is established.

12. Can Private DNS cause internet problems?

Yes. An unreachable or incorrectly configured Private DNS service can make the connection appear unusable.

13. Can antivirus software interfere with Android Wi-Fi?

Some security applications use VPN-based filtering or network inspection and can interfere with connectivity, particularly after major Android changes.

14. Why does 2.4 GHz work but 5 GHz not work?

Possible causes include router channel selection, DFS channels, regional settings, firmware compatibility, or band-specific configuration.

15. Can I manually assign a static IP address?

Yes, Android supports static IP configuration, but it should only be done when the correct IP, gateway, subnet, and DNS values are known.

16. Why does Wi-Fi keep disconnecting after the update?

Possible causes include software bugs, router compatibility, VPN/security software, band steering, weak signal, network settings corruption, or third-party applications.

17. How can Safe Mode help diagnose Wi-Fi?

Safe Mode prevents most downloaded applications from running. If Wi-Fi works correctly there, a third-party application is likely involved.

18. Can another Android update fix the problem?

Yes. If a Wi-Fi problem is caused by a software defect in a particular build, the manufacturer may provide a correction in a subsequent update.

19. Can a factory reset fix post-update Wi-Fi problems?

It can resolve corrupted configuration or software conflicts, but it is not guaranteed to repair firmware defects or hardware failures.

20. How do I know if my Wi-Fi hardware is damaged?

If the device cannot detect networks or enable Wi-Fi even after a clean factory reset and it fails with multiple known-good routers, professional hardware diagnosis should be considered.

Conclusion

Wi-Fi failure after an Android update does not automatically mean that the phone's Wi-Fi hardware is damaged.

Begin with low-risk troubleshooting: restart the phone and router, forget and reconnect to the network, test another device and another Wi-Fi network, and temporarily disable VPN or custom DNS settings.

If necessary, progress to network settings reset, Safe Mode, router compatibility testing, and additional Android updates.

A factory reset should remain one of the final software troubleshooting options because it requires careful backup and device reconfiguration.

Most importantly, determine whether the problem follows the Android device across multiple Wi-Fi networks or occurs only with one particular router. That distinction greatly reduces unnecessary troubleshooting.

 

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