“After a recent iOS update, my iPhone disconnects from WiFi whenever the screen locks. When my phone goes into sleep mode (with the screen blank), and the WiFi disconnects, I can no longer receive phone calls.”
Recently, some iPhone users have left the feedback that the WiFi connection was stable when they used the device. But the iPhone always disconnects from wifi when locked, why?
If your iPhone also appears to disconnect from WiFi when locked, the techniques introduced in this article will help you resolve this Wifi connection issue.
If your have turned on the WiFi Assist on iPhone, the device will automatically connect to cellular data when the WiFi signal is poor or there is no other available WiFi network. This may cause iPhone to automatically disconnect from WiFi when locked. Therefore, you can turn off WiFi Assist to fix this problem.
Go to Settings - Cellular to see if the option of Wi-Fi Assist is turned on.
If it is turned on, just turn it off.
If your iPhone is connecting to the Wifi network, forget the Wifi and join again to see if this will resolve this issue. Take a note of the Wifi password before following the below steps.
Open Settings on iPhone.
Click on Wifi and tap that Wifi that your iPhone connected with.
Then tap on Forget This Network on the next interface.
Wait patiently about 1 minute and join the Wifi network again.
Most glitches on your iPhone or iPad can be fixed by forcing restart the device, including the issue of iPhone disconnects from Wifi when locked.
For full-screen iPhone (iPhone 8 and later): quickly press the volume + and then the volume - button, and then keep pressing the Power button until the Apple logo is displayed.
For iPhone 7/7 Plus, etc: press and hold the top (or side) button and the volume - button simultaneously until the Apple logo is displayed.
For iPhone with Home button (iPhone 7 and earlier): press and hold the Home button and the On/Off button at the same time until the Apple logo is displayed.
When VPN is enabled, the WiFi connection may be very unstable. Therefore, you can disable VPN to see if it can solve this problem of iPhone disconnecting from WiFi when locked.
Go to Settings - VPN and disable VPN if it is on.
If you have installed a 3rd-party VPN app on your iPhone, just remove the app.
Sometimes, this issue may also be due to the WiFi router if you have not used it for a long time.
In this case, you can turn off the WiFi router by pressing the On/Off button or just unplug the power cord.
Wait for a few seconds and turn on the router again.
If your iPhone still keeps disconnecting from Wifi when locked, there may be some problems with iPhone network settings. In this case, you can try to reset the network settings.
Go to Settings - General - Reset and select Reset Network Settings.
Note: This will not erase the data on your iPhone, but the WiFi password stored on the device will be deleted.
If your iPhone runs an outdated iOS version, the device may have some software glitches causing errors like WiFi disconnects when iPhone is locked. In this case, you’d better update iPhone to the latest iOS version.
Go to Settings - General and click on Software Update.
If you can find the new iOS update here, click on 'Download and Install' to update the iOS version.
If the above solutions still don't solve the problem of iPhone disconnects from Wifi when locked, you can use a 3rd-party tool - LazePaw iOS System Recovery, which is developed to repair 150+ iOS system problems such as the iPhone won't turn on, or stuck in recovery mode, black screen, update failure and other problems.
What’s more, the iPhone data will not be affected when you use the ‘Standard Mode’.
Step 1: Launch the iOS device repair tool and connect your device to the computer via the USB cable, then click on "Repair Operating System".
Step 2: After the software recognizes the device, click on "Download" and start repairing it after successful downloading the firmware.
The whole repair process may take about 10 minutes, be careful not to disconnect the data cable and wait for the repairing process to complete.
Teresa is tech-savvy and has 5-year experiences in writing articles about mobile phones, computer, etc.