Network troubleshooting technician providing live chat help

Joe B.

Reviewed for technical accuracy

Specialities: Home networking, Wi-Fi routers, mesh systems, Android & Samsung Wi-Fi issues, DNS & IP configuration, ISP setup

Fix “Android Wi-Fi not working after update” — no internet, won’t connect, keeps dropping

Technician avatar Technician
Hi! We’ll get your Android Wi-Fi not working after update issue fixed so your phone goes online normally again instead of showing “Connected, no internet” or refusing to join Wi-Fi. I just need a quick picture of your setup so we can target the right fixes.

What Android phone are you using (Samsung Galaxy, Google Pixel, OnePlus, Motorola, etc.), and which Android version / system update just installed (for example Android 13, 14, 15 or a One UI / security patch)?

On Wi-Fi, do you see errors like “Saved, not connected”, “Authentication problem”, or does the Wi-Fi toggle turn off by itself? And if you try mobile data, does the internet work there, or is it only Wi-Fi broken after the update?
Customer
It’s a Samsung Galaxy that just updated last night (One UI based on Android 14 I think). Since the update, Wi-Fi stopped working properly. It connects to my home network but either says “Connected without internet” or the pages just don’t load. Other devices (laptop, TV) are fine on the same router, so it seems like an Android Wi-Fi issue after update and not the internet itself.
Technician avatar Technician
Got it, that helps a lot. It’s pretty common for a Samsung or Android Wi-Fi problem after a system update to show up only on one phone while everything else on Wi-Fi looks normal.

After a big Android or One UI update, a few things can break Wi-Fi:

• Old Wi-Fi configuration data or DNS settings conflicting with the new Android network stack.
• A glitchy Wi-Fi driver after the firmware update, causing “connected but no internet” or random disconnects.
• Features like MAC address randomization, Private DNS or VPN apps suddenly clashing with your router or ISP.
• Corrupted network cache — the phone “remembers” bad info from before the reboot and keeps trying to use it.

We’ll flush all that out step by step: first a simple Wi-Fi reset on the phone and router, then forget & re-add the Wi-Fi network, and if needed, a full reset of network settings on Android so Wi-Fi behaves like it’s on a fresh install again.
Customer
That makes sense. I did reboot the phone once, but it didn’t fix it. If I toggle Wi-Fi off and back on, it sometimes works for a minute then goes back to no internet on Wi-Fi. Mobile data works fine. At work my phone is also slower on the office Wi-Fi since the update, so it’s not just my home router.
Technician avatar Technician
Perfect, that gives us a clear path — sounds like a classic Android Wi-Fi not working after update case where the phone is the common factor, not the routers.

Step A — Quick Android & router refresh
1) Turn Airplane mode on for 10 seconds, then off. This forces Android to restart all radios (Wi-Fi, mobile, Bluetooth).
2) Restart the phone again, but this time let it fully power off for 30 seconds before turning it back on.
3) On your home router, unplug it from power for 30 seconds and plug it back in so it renews IP and DNS from the ISP.

Step B — “Forget” and reconnect to Wi-Fi
1) On the phone go to Settings > Connections > Wi-Fi (or Network & internet > Internet on some Androids).
2) Tap your home network > Forget.
3) Turn Wi-Fi off, then on again, and reconnect by typing the password from scratch.

After you reconnect, browse a couple of sites or run a speed test right away. Tell me what you see: still “Connected, no internet”, pages partly loading, or stable for longer than before?
Customer
I did all that: airplane mode, full phone restart, router power cycle, and then I forgot and re-added the Wi-Fi network. It connected fine and worked for about 5–10 minutes, then suddenly Chrome said it was offline again. The status bar still showed Wi-Fi, but apps acted like there was no connection. Same thing happens if I try my 5 GHz network instead of 2.4 GHz.
Technician avatar Technician
Thanks for testing — that pretty much confirms this is an Android network stack issue after the update, not a bad password or basic router problem.

Now we’ll do the Android-level fixes that usually clear Wi-Fi not working after update problems:

Step C — Reset network settings on Android
• Go to Settings > General management > Reset > Reset network settings (wording may be slightly different per model).
• Confirm the reset. This will erase saved Wi-Fi networks, Bluetooth pairings and mobile APN settings, but it will not delete your photos or apps.
• When the phone reboots or finishes, turn Wi-Fi on and reconnect to your home network again.

Step D — Check Private DNS and MAC address
• In Wi-Fi > your network > Advanced, set Privacy / MAC type to “Randomized MAC” unless your router is bound to the old one.
• Under Settings > Connections > More connection settings, set Private DNS to “Automatic” (not a custom hostname) while we test.

Try Wi-Fi again after those changes and let me know if the connection still drops or shows “no internet” after a few minutes.
Customer
I did the Reset network settings and then reconnected. It took a little longer to join Wi-Fi, but it worked. I checked and Private DNS was set to a custom one before; after the reset it’s back to automatic. It’s better now, but I still get random moments where apps spin and then suddenly catch up. It’s like Android Wi-Fi is unstable after the update — not totally dead, but spiky.
Technician avatar Technician
Good, that reset clearly helped, so we’re on the right track. Now we’ll chase down what’s causing those last Wi-Fi drops after the Samsung / Android update.

Step E — Rule out apps and aggressive battery settings
1) Press and hold the power key, then tap and hold “Power off” until you see Safe mode and confirm. In Safe mode, only core Android apps run.
2) While in Safe mode, connect to your Wi-Fi and browse / stream for 10–15 minutes. If Wi-Fi stays solid here, it means a third-party app (VPN, firewall, “Wi-Fi booster”, battery saver, etc.) is interfering after the update.
3) Also check Settings > Battery > Power saving and make sure “Limit apps and Home screen” or any options that restrict background data on Wi-Fi are turned off while testing.

Step F — Temporarily disable VPN, “Secure Wi-Fi” and similar tools
• Turn off any VPN apps, ad-blockers, or Samsung “Secure Wi-Fi” type features.
• If you have “Dual apps” or work profile that uses a separate VPN, pause those too.

Test again outside of Safe mode after that. If Wi-Fi is fine in Safe mode but flaky in normal mode, we’ll pinpoint which app or setting is the culprit.
Customer
In Safe mode, the Wi-Fi connection was perfect for about 20 minutes — no drops at all. Once I restarted back to normal, it started doing the “pages spin then load all at once” thing again. I do use a VPN and a security app that scans Wi-Fi networks, plus Samsung’s own “auto optimization” stuff. Seems like the Android update changed how those interact with Wi-Fi.
Technician avatar Technician
That’s really useful info — if Wi-Fi is stable in Safe mode, the hardware and Android core are fine. The update plus one or more apps is causing the Android Wi-Fi issues after update.

Do this next:
• Turn your VPN completely off and disable “always-on VPN” in its settings if enabled.
• In your security / Wi-Fi scanner app, turn off any “real-time protection”, “Wi-Fi protection” or traffic filtering features, then test.
• Go to Settings > Apps, find the VPN and Wi-Fi security apps, and under Battery turn off aggressive optimizations so Android doesn’t constantly pause and resume them in the background.

Then, in your Wi-Fi network’s Advanced settings:
• Make sure IP settings are on DHCP, not forced static IP from an old config.
• If your router has both 2.4 GHz and 5 GHz with the same name, try temporarily connecting to a standalone SSID on one band to see if roaming is an issue.

Once you test with these changes, let me know if your Android Wi-Fi connection feels smoother and if those random freezes disappear.
Customer
Turning off the VPN and disabling Wi-Fi scanning in the security app helped a lot. Browsing is smooth now and I don’t see the constant “offline” messages anymore. I also checked the advanced network settings and it was on DHCP. The only thing I still notice is that sometimes when I come home, the phone takes a while to auto reconnect to Wi-Fi after the update.
Technician avatar Technician
Great, so we’ve basically fixed the big Android Wi-Fi not working after update problem and now we’re just polishing behavior.

For the slow auto-reconnect:

• Go to Settings > Connections > Wi-Fi > three dots > Advanced and make sure “Turn on Wi-Fi automatically” and “Auto reconnect” are enabled for your home network.
• Turn on “Wi-Fi scanning” under Location services if it was disabled; some Android builds rely on that for faster AP discovery.
• In Settings > Battery, exclude Wi-Fi, Android System and Google Play services from any extreme power-saving profiles so they’re allowed to scan / reconnect in the background.

If your router has any “AP isolation” or client separation mode enabled, turn that off as well — a few phones act oddly with that after an update.

After these tweaks, lock the screen, walk out of range and come back in. Your phone should reconnect to your home Wi-Fi network more reliably now.
Customer
I enabled auto reconnect and Wi-Fi scanning, and removed the system from the extreme battery saver list. Now when I get home, it latches onto Wi-Fi in a few seconds. So overall the Android Wi-Fi problems after the update seem fixed — it connects, stays online, and doesn’t randomly say “no internet” anymore.
Technician avatar Technician
That’s exactly what we wanted. 👍

Summary: To fix Android Wi-Fi not working after update, power-cycle the phone and router, forget and re-add the Wi-Fi network, then reset network settings on Android so old configs don’t conflict with the new system. Next, adjust Private DNS, MAC address and battery settings, test in Safe mode, and tame or remove VPN / security apps that break Wi-Fi after the update. Finally, turn on auto reconnect and Wi-Fi scanning so the phone joins your networks quickly again.

If this ever pops up again after a future Android version or One UI update, you can open a chat with an expert and we’ll walk through these steps live with your exact phone model and router.
Customer
Perfect, thanks. I was worried the update had completely broken my phone’s Wi-Fi, but now I know it was mostly old settings and apps fighting with the new Android version. Everything’s working again on Wi-Fi at home and at work.
Technician avatar Technician
Any time! If a friend complains that their Android Wi-Fi stopped working after an update, Wi-Fi keeps disconnecting, or the phone is always stuck on “Connected without internet”, you can share this checklist.

And if you ever want someone to click through Android Wi-Fi settings, router options and VPN apps with you in real time, just start a chat with an expert and we’ll take it from there.

Quick answer: the accepted fix

Accepted fix when Android Wi-Fi is not working after an update: restart phone and router, forget and reconnect to Wi-Fi, then reset network settings on Android, set Private DNS to automatic, turn off or reconfigure VPN / security apps, and re-enable auto reconnect so Wi-Fi connects and stays online normally again.

Why Android Wi-Fi breaks after an update (drivers, DNS, apps & power saving)

Most Android Wi-Fi problems after an update are caused by a mix of new network drivers and old settings that don’t play nicely together. When the system updates, it can change how the phone handles Wi-Fi authentication, DHCP, DNS and VPN. If you had custom DNS, VPN, or security apps installed before, they may start causing Wi-Fi not working, “connected without internet”, or constant disconnects right after the update.

Power-saving options can also interfere. Aggressive battery modes that were fine on the previous version might now suspend Wi-Fi background services too often, making Android Wi-Fi unstable. That’s why fixes like resetting network settings, checking Private DNS, disabling VPNs temporarily, and relaxing battery limits are so effective for Wi-Fi issues that only appeared after the phone updated.

How to tell if it’s the Android update, your router, or your ISP

To narrow down an Android Wi-Fi not working after update problem, test in a structured way:

First, see if other devices on the same Wi-Fi (laptop, tablet, smart TV) can browse normally. If they can, the router and internet are likely fine and the issue is on your phone. Next, connect your phone to a different Wi-Fi network (work, hotspot, café). If Wi-Fi is broken on every network, it’s almost certainly an Android software or settings issue, not just your router.

You can also toggle between Wi-Fi and mobile data: if mobile data works but Wi-Fi doesn’t, focus on Wi-Fi settings, VPNs, security apps and network resets. If neither works after the update, you might be dealing with a deeper system bug or carrier issue that an expert or service center needs to investigate.

Android Wi-Fi not working after update — quick troubleshooting tips

Reset network settings, clean up DNS & VPN, then test Wi-Fi in Safe mode.

Fast path: restart your Android phone and router → forget and reconnect to your Wi-Fi network → run a full Reset network settings on Android → set Private DNS to automatic and check MAC address / DHCP → temporarily disable VPN and Wi-Fi security apps → test Wi-Fi in Safe mode to confirm stability, then re-enable only the apps that don’t break your connection.

Disclaimer: This information is AI-generated and intended for general guidance only. For advice specific to your Android phone model, router and ISP, please consult a verified expert on Whizz-Tech before making decisions.

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FAQ

Why is my Android Wi-Fi not working after a system update?

An Android Wi-Fi not working after update issue usually means the new system software is clashing with old network data, VPNs, or security apps. Common causes include changed Wi-Fi drivers, outdated DNS or IP settings, aggressive battery saving, or third-party apps filtering traffic. That’s why resetting network settings, checking Private DNS and testing in Safe mode are key steps.

How do I fix Android Wi-Fi not working after an update?

Start by restarting your phone and router, then forget and reconnect to Wi-Fi. If that doesn’t help, go to Settings > Reset > Reset network settings to clear old Wi-Fi and mobile configs. Set Private DNS to automatic, disable VPN and Wi-Fi security apps temporarily, and make sure battery saving isn’t restricting network access. If Wi-Fi works fine in Safe mode, you’ll know a third-party app is causing the trouble.

Will resetting network settings delete anything important?

Resetting network settings on Android won’t erase your photos, files or installed apps. It only resets Wi-Fi, Bluetooth, mobile data and VPN settings. You’ll need to re-enter Wi-Fi passwords and repair Bluetooth devices, but for stubborn Android Wi-Fi issues after an update, this is often the most effective and safest fix.

When should I contact support or an expert about Android Wi-Fi issues?

If you’ve tried network reset, Safe mode tests, and basic router checks but your Android Wi-Fi still isn’t working after the update on multiple networks, it may be a deeper software bug or hardware fault. At that point, it’s worth chatting with a professional who can review logs, router settings and Android version details, or advise you if a service center visit or warranty repair is needed.

Sources

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