A phone that keeps disconnecting from WiFi does not automatically have a faulty wireless chip. The cause may be a damaged saved network profile, weak coverage, automatic switching to mobile data, a VPN or security app, or a router that is dropping every connected device.
Before resetting anything, compare the phone with another device and another WiFi network. Those two tests usually reveal whether the problem follows the phone or stays with the router.
Run Two Tests Before Changing Any Settings
Connect another phone, tablet, or laptop to the WiFi network that keeps dropping. Then connect the affected phone to a different trusted network.
| What happens | Where to focus |
|---|---|
| Several devices disconnect from the same network | Router, modem, mesh system, or internet provider |
| Only this phone disconnects from one network | Saved network profile or compatibility with that router |
| The phone disconnects from several networks | Android settings, an installed app, or phone hardware |
| WiFi remains connected but apps lose internet | Router internet access, VPN, DNS, or ISP problem |
| The WiFi icon disappears and mobile data appears | Automatic network switching or a weak WiFi signal |
Google’s current Pixel WiFi guidance recommends this same comparison: test another device on the original network and test the phone on another network. It provides better evidence than immediately resetting Android.
Restart the Phone, Router, and Modem
Restart the phone first. If the connection still drops and you control the network, unplug the router and modem for about 15 seconds. Reconnect the modem first when they are separate devices, allow it to finish starting, and then reconnect the router.
Wait until the normal status lights return before testing the phone. A router that temporarily improves after every restart may need a firmware update, better ventilation, or replacement rather than further changes to Android.
Forget the WiFi Network and Reconnect
A saved WiFi profile can retain an outdated password, security setting, or connection detail. Removing that profile forces Android to build it again.
On Pixel and many Android phones, open:
Settings > Network & internet > Internet > Saved networks > network name > Forget
On Samsung Galaxy, open:
Settings > Connections > Wi-Fi
Press and hold the affected network or open its settings, then choose Forget network. Select the network again and enter its current password.
Forgetting a network removes its saved password from that phone. Check How to Find Saved WiFi Passwords on Android first if you do not know it.
Check Whether Weak Coverage Is Causing the Drops
Test the phone close to the router without moving around. A connection that becomes stable near the router but fails in another room points to coverage or interference rather than a broken Android setting.
Concrete walls, large appliances, poorly positioned mesh nodes, and nearby networks can weaken the signal. The 2.4 GHz band normally reaches farther and passes through walls more effectively, while 5 GHz usually provides higher speed at a shorter range. Neither band is always better.
If the router uses separate names for its 2.4 GHz and 5 GHz networks, test each one. Consistent failures on only one band can reveal a compatibility, range, or router-configuration problem.
Mesh WiFi adds another possibility. The phone may disconnect briefly while moving between access points if roaming is not working correctly. Test beside one mesh node while remaining in place. A stable connection there, followed by drops only while walking through the building, points toward mesh placement, firmware, or roaming settings.
Stop the Phone From Automatically Leaving WiFi
Some phones move to mobile data when WiFi becomes weak or loses internet access. The change can look like a random disconnection even though the phone is responding to an enabled network feature.
Samsung Galaxy
On many Galaxy phones, open:
Settings > Connections > Wi-Fi > More options > Intelligent Wi-Fi
Temporarily turn off settings such as Switch to mobile data, Switch to better Wi-Fi networks, or Turn Wi-Fi on/off automatically, depending on what your model displays. Test one change at a time so you know which setting affected the connection.
Some Galaxy models also include Wi-Fi power saving mode in Intelligent Wi-Fi. Disable it temporarily if the disconnects mainly occur while the screen is off. Menu names vary by phone and One UI version.
Google Pixel
On supported Pixel phones, open:
Settings > Network & internet > Adaptive connectivity
Look for Auto-switch to mobile network. Google’s current description says this option can move the phone to cellular data when WiFi has no internet connection or when the local connection to the access point is weak.
Turn the option off temporarily while testing. This does not repair a weak network, but it prevents mobile data from hiding what the WiFi connection is doing. Remember that the phone may remain connected to WiFi without working internet while auto-switching is disabled.
Do not confuse that option with the main Adaptive connectivity control. Google primarily describes Adaptive connectivity as a battery-saving feature that manages when Pixel uses 5G.
Confirm Whether WiFi Is Disconnecting or Only Losing Internet
Watch the WiFi symbol when the failure happens.
- If the WiFi symbol disappears and the phone changes to 4G or 5G, the phone has left the wireless network.
- If the WiFi symbol remains but shows an exclamation mark, or apps stop loading, the phone may still be connected to the router without internet access.
These are different problems. A connected phone with no internet may be affected by an ISP outage, router DNS problem, failed captive portal, VPN, or custom DNS setting. Follow Wi-Fi Connected but No Internet on Android when the WiFi connection itself remains active.
Test the VPN and Private DNS Settings
Turn off any active VPN and use the phone normally for a while. A VPN kill switch, unavailable server, or local-network restriction can make apps lose connectivity even when WiFi remains connected. If turning off the VPN solves the problem, update the app, try another server, and review its kill-switch and local-network settings before reinstalling it.
A custom Private DNS hostname can produce a similar loss of internet access. Open:
Settings > Network & internet > Private DNS
Select Automatic, save the change, and test again. Google recommends leaving Private DNS enabled where supported, so use Automatic rather than turning it off permanently. Private DNS usually does not disconnect the WiFi radio, but a failed provider can make the network appear unusable.
Use Safe Mode to Check for an App Conflict
VPNs, firewalls, antivirus apps, battery managers, automation tools, and network monitors can change how Android handles a connection. Safe Mode temporarily disables downloaded apps without deleting them.
Test the same WiFi network in Safe Mode. If the phone remains connected there, restart normally and remove recently installed network, security, or battery apps one at a time. Test after each removal instead of uninstalling several apps together.
Samsung’s current WiFi troubleshooting instructions also recommend Safe Mode when a downloaded app may be responsible. If the phone will not leave Safe Mode after the test, use Android Stuck in Safe Mode.
Correct the Date and Install Available Updates
An incorrect date and time can interfere with secure connections and WiFi authentication. Open:
Settings > System > Date & time
Turn on Set time automatically and confirm that the time zone is correct.
Next, install any available Android or manufacturer update. Pixel normally places this under Settings > System > Software updates, while Samsung uses Settings > Software update. Updates can correct wireless-driver bugs, router compatibility problems, and connection-management errors.
When the problem begins immediately after an update, check for a newer maintenance patch before considering a reset. Also restart the phone once after the installation is complete.
Handle Public WiFi Sign-In Problems Separately
Hotels, airports, cafes, schools, and workplaces may require a sign-in or terms page. The phone can appear connected and then lose access because that page was never completed or the session expired.
Open a browser and visit a normal unencrypted address, or tap the Sign in to Wi-Fi network notification if it appears. If the sign-in page still does not load, forget the public network, reconnect, and check for the notification again.
Some public networks deliberately disconnect inactive devices. Repeated drops on one managed network do not establish that the phone is faulty.
Reset WiFi and Bluetooth Settings
Use a network reset only after the more targeted checks. It removes saved connection data but does not erase photos, apps, or other personal files.
On Pixel and many Android phones:
Settings > System > Reset options > Reset Bluetooth & Wi-Fi
On Samsung Galaxy:
Settings > General management > Reset > Reset Wi-Fi and Bluetooth settings
The reset can remove saved WiFi networks, passwords, Bluetooth pairings, and related preferences. Reconnect to one network and test before restoring every accessory.
When the Router Needs Attention
Focus on the router, modem, or ISP when several devices disconnect, the phone works normally elsewhere, or the problem occurs only in one part of the building. Router firmware, overheating, channel congestion, band steering, mesh placement, or an internet-service fault may be responsible.
Do not change advanced router settings at random. Install the manufacturer’s current firmware, confirm that cables and power supplies are secure, and check the provider’s outage status. On a managed workplace, school, hotel, or apartment network, report the time of the disconnection and the phone’s model to the administrator.
When the Phone May Need Service
The phone deserves closer attention when it disconnects from several unrelated networks while other devices remain stable. A hardware problem becomes more plausible when WiFi, Bluetooth, and the phone’s hotspot all fail together, or when the phone cannot detect nearby networks that other devices can see.
Samsung owners can run the WiFi test in Samsung Members > Support > Phone diagnostics before arranging repair. For hotspot-only failures, use Android Hotspot Not Working? How to Fix It instead.
A factory reset should be the last software test, not an early recommendation. Consider it only after the phone fails on several networks, Safe Mode makes no difference, Android is updated, network settings have been reset, and important data is backed up. A phone that works normally on other WiFi networks is unlikely to benefit from a factory reset.
If the disconnects continue, note whether the WiFi icon vanishes, whether mobile data takes over, which networks are affected, and whether the screen was locked. Those details will make a support or repair diagnosis much more useful.
