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9 Tips to Fix WiFi Disconnects When iPhone is Locked in iOS 15/14

DoubtUser Concern

“After a recent iOS update, my iPhone disconnects from WiFi whenever the screen locks. This is a HUGE problem as I am at a location without cellular service so I need to use WiFi to make and receive calls. Any suggestion to this?”

Many iPhone users have encountered WiFi problems at some point or the other, for example: "WiFi disconnects when iPhone is locked". Later, the official version of iOS 15 is released for fixing this problem. Most users thought that this error would never happen again. However, problem existed stilly, then what is going on?

If your iPhone disconnects from wifi when locked, you've come to this right place. Read on this article and learn effective ways to fix this issue.

1. Force Restart iPhone

A force restart can help to fix many minor glitches on iPhone or iPad, including this iPhone/iPad WiFi disconnects when locked issue. So, don't hesitate to give it a try.

  • To force restart iPhone 8 and later: Simply press and release the volume up button quickly, press and release the volume down button quickly, then press and hold the side button until Apple logo shows up.

  • To force restart iPhone7 or 7 plus: Press and hold the volume down button and power button at the same time unti you see the Apple logo.

  • To force restart iPhone 6s and earlier: Press and hold the home button and power button simultaneously unti Apple logo appears on the screen.

force restart iphone

2. Forget and Re-join WiFi Network

In our experience, any WiFi network connection problems can be resolved by forgetting and rejoining the WiFi network.

  1. Firstly, click on Settings > WiFi. In the wireless LAN interface, click the "i" icon behind the WiFi name.

  2. Then click "Forget This Network". In the pop-up of "Forget WiFi Network" interface, click "Forget".

  3. Go back to the WiFi network interface, re-click the name of the WiFi network you want to connect to, and then enter the correct WiFi password to connect.

forget this network

After successful connection, lock your iPhone and check whether WiFi will still disconnect.

3. Renew the Lease

If forget the WiFi network doesn't solve the problem, you can try to renew the DHCP lease of your network and obtain a new IP address for your iPhone. To renew the lease of your network, follow these steps:

  1. Open the Settings app and go to WiFi, then tap on the "i" icon next to the Wi-Fi network.

  2. Scroll down to locate the "Renew Lease" option and tap on it.

  3. Tap on "Renew Lease" again on the popup to confirm the action.

renew lease wifi network

4. Disable Wi-Fi Networking Services

It is proven that WiFi disconnects when iPhone is locked problem could also be eliminated by turning off the option of Wi-Fi networking services.

  1. Open the Settings app on your iPhone and click on "Privacy".

  2. Hit on "Location Services" and then "System Services" to toggle off "Wi-Fi Networking".

disable wifi networking

5. Disable VPN from iPhone Settings

The WiFi connection on iPhone may be unstable when VPN feature is enabled. Therefore, you may need to turn off this feature to see if it is woking to salve this iPhone keeps disconnecting from wifi when locked problem. On your iPhone, go to Settings > General > VPN and toggle off the VPN if it is activated.

disabled vpn from iphone setting

6. Turn Off Wi-Fi Assist

With Wi-Fi Assist, the iPhone will turn on the cellular data when the connected Wi-Fi network is poor or there is no available Wi-Fi network. And this may be the cause of WiFi disconnects when iPhone is locked or in sleep mode. So, you can turn off the Wi-Fi Assist.

  1. Click on "Cellular" on the iPhone Settings interface.

  2. Find the option of "Wi-Fi Assist" and toggle to turn it off.

turn off wifi assist

7. Check WiFi Router

Sometimes, when the WiFi router is used for a long time, the WiFi will disconnect when iPhone is locked. In this case, you can check if there is anything wrong with the router.

  • Power off the WiFi router using the ON/OFF button if available or simply unplug the power cable. Wait for few seconds and power on the router.

  • There is a factory reset button at the back of the WiFi router. Just long press this button to reset the wifi router. After reset, enter the broadband account and password to see if it works for you.

  • Also, try to update the router firmware if it is outdated. The process of updating the WiFi router may vary on different router manufacturers. You'd better check the user manual or directly contact the manufacturer for help.

8. Reset Network Settings

There may be some problems with the iPhone system if the WiFi still disconnects when the phone is locked. You can solve this problem by resetting the iPhone network settings.

Go to Settings > General > Reset > Reset Network Settings to reset the iPhone's network. You can rest assured that this network reset will not erase the iPhone data, but the WiFi passwords stored on the phone will be reset. Wait for the system to restore and reboot, then try to connect to the WiFi network to see if the WiFi connection is normal.

reset network settings

9. Best Way to Fix iPhone Disconnecting from WiFi When Lcked

If the issue is not hardware related, then it will be quite simple to resolve the software related issue by reading this part. It is understandably that you wish to have this WiFi issue fixed within the shortest time. The recommended way to fix this WiFi issue is using FoneGeek iOS System Recovery. All the iOS related problems can be settled with this software without data loss.

  • Exclusive skills and technology are used to fix any stubborn problems without deleting or modifying your iPhone data.

  • Well-known sites have given positive reviews to our software, just like CNET, Software.Informer, Filehorse, GetDroidTips, Lera Blog, etc.

  • With easy-to-understand interface, you can easily use this software without asking other person for help.

  • It is workable for all iOS deviceS and all iOS versions, including the latest iPhone 12 mini/12/12 Pro (Max) and iOS 15/14.


Simply follow the steps below to fix iPhone drops wifi when locked issue:

Step 1. Download and install FoneGeek iOS System Recovery on your computer, then run it and click on "Standard Mode" on the main window.

choose repair mode

Step 2. Connect the iPhone that has the WiFi disconnect issue. If prompted, you need to follow the steps on the screen to get your iPhone into Recovery or DFU mode.

connect ios device

put iphone into recovery mode

Step 3. The firmware package of different iOS versions that match the iPhone will be shown in the new window. Choose the firmware that matches the device most and click on "Download".

download firmware

Step 4. The firmware will soon be downloaded to fix your iPhone. Click on "Fix Now" and the WiFi problem on the device will be fixed.


Bonus Tip: How to Keep WiFi On When iPhone is Locked

  • Adjust iPhone Settings: Turn off the WiFi LAN assistant and the Low Battery mode.

  • Hotspot Selection: Avoid to connect the WiFi network in public area. It is better to connect encrypted hotspots.

The above is the entire content of this article, hope this post will be helpful for you. If you have other questions, you can leave a message below.

Fay J. Melton
Monday on Aug 19, 2019, 22:11:52 GMT / Post By Fay J. Melton to iOS 15

Fay J. Melton has explored the area of technology and software for more than 5 years and he is enthusiastic about helping users solve various technology issues.

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