After upgrading to iOS 15.4.1, the lock screen causes WiFi to disconnect automatically. How to solve this problem?

"After upgrading to iOS 15.4.1, my iPhone always disconnects from WiFi after locking the screen. I tried the method mentioned on the Internet to restore the network settings, but the WiFi still disconnects from locking the screen. Please help me solve this problem!"

Some iPhone users have recently reported that their phones have no problems with WiFi connection during normal use and the signal is very stable. However, once the phone locks the screen, WiFi will be automatically disconnected. Excuse me, why is this?

If your iPhone has the problem of disconnecting from WiFi after locking the screen, there is no need to worry. Next, I will introduce to you how to solve the problem of Apple mobile phones automatically disconnecting from WiFi after locking the screen.

1. Uninstall Master Key

First check whether your iPhone has Master Key installed This kind of software then connects to WiFi through a master key. If so, just uninstall the app.

2. Turn on automatically joining WiFi

If you turn off the automatic joining WiFi function, your iPhone may also disconnect from the WiFi after it automatically locks the screen. Therefore, it is recommended that you enable this feature. Go to Settings - Wireless LAN, click the exclamation mark to the right of the WiFi name, and turn on automatic joining.

3. Turn off Wireless LAN Assistant

If your iPhone has the Wireless LAN Assistant function turned on, when the connected WiFi network is poor or there is no available WiFi When connected to the Internet, the device will automatically connect to cellular data, which may cause the iPhone to automatically disconnect from WiFi after locking the screen.

Therefore, you can turn off this feature to solve this problem. Go to Settings - Cellular Network, scroll to the bottom and see if the Wireless LAN Assistant option is turned on. If it's on, just turn it off.

4. Force restart iPhone

Force restarting the device can help fix many glitches on your iPhone or iPad, including automatically disconnecting from WiFi after locking the screen. question.

Choose the corresponding boot method according to different mobile phone models:

The operation method for full-screen models (iPhone8 and later) is as follows: first quickly press the volume up key and volume down key, and then Continue to hold the power button until the Apple logo appears on the screen. Press and hold the top (or side) button and the volume down button of 7th generation devices (iPhone 7, iPhone 7 Plus, etc.) until the Apple logo appears. Logo

For models with a Home button (such as iPhone7 and previous models), you need to press and hold the Home button and the power button at the same time until the Apple logo

## appears on the screen

#5: Repair iOS system

If the above method cannot solve the problem of iPhone automatically disconnecting from WiFi after locking the screen, you can try to use a third-party tool-Apple Phone Repair Tool. This software can fix 150 types of iOS device system problems. Whether the device cannot be turned on, a white apple appears, is stuck in recovery mode, has a black screen, fails to update or keeps restarting, etc., you can use this tool to fix it

In "Standard Repair" mode, iPhone will not lose any data!

Operation Guide:

Step 1: Start the Apple phone repair tool, connect the device to the computer through the data cable, and click "Repair iOS System Problems".

Step 2: Wait for the software to recognize the device, click the "Download Firmware" button, and start the repair after the download is complete

The repair process takes about 10 minutes. Please be careful not to disconnect the data cable and wait until "Repair Completed" is displayed

Step 3: The system is repaired successfully. A "standard repair" performed by default without losing device data. If the device still cannot be turned on, it is recommended to perform "deep repair" mode, but the iPhone will lose data, so it needs to be backed up in advance. If you have backed up in iCloud/iTunes, you can restore the data after repair!

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