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iPhone Disconnects From WiFi When Locked or in Sleep Mode

By: Waseem Patwegar

If iPhone Disconnects from WiFi whenever it is locked or goes in sleep mode, you will have a hard time making calls over WiFi network.

iPhone Disconnects From WiFi When Locked or in Sleep Mode

While some users have reported this problem after an iOS update, it can also occur at any time due to network related issues.

WiFi Disconnects When iPhone is Locked or in Sleep Mode

As mentioned above, the problem of WiFi disconnecting from iPhone when locked is usually caused by network related issues and you should be able to fix this problem using steps as provided below.

1. Renew DHCP Lease

Obtain a New IP Address for your iPhone by renewing the DHCP lease and this should help in fixing the problem.

1. Go to Settings > WiFi > tap on your WiFi Network Name.

Turn On WiFi On iPhone

2. On the next screen, scroll down and tap on Renew Lease option.

Renew DHCP Lease on iPhone

3. On the confirmation pop-up, tap on Renew Lease to confirm.

2. Turn OFF WiFi Assist

The problem might be due to the WiFi Assist feature on your iPhone switching your device from WiFi to Cellular Network.

1. Open Settings > scroll down and tap on Cellular.

2. On the next screen, disable WiFi Assist by moving the toggle to OFF position.

Disable WiFi Assist on iPhone

3. Disable VPN

If you are using VPN, disable the VPN service on your iPhone and see if this helps in fixing the issue.

1. Go to Settings > General > VPN.

2. On the next screen, move the toggle next to Status to OFF position.

Disable VPN on iPhone

4. Forget WiFi Network and Rejoin

Note down your WiFi Password and follow the steps below to Forget WiFi Network and rejoin the Network.

1. Go to Settings > WiFi > tap on your WiFi network.

Active WiFi Network Name on iPhone

2. On the next screen, tap on Forget This Network option.

Forget WiFi Network Option on iPhone

3. On the confirmation pop-up, tap on Forget to confirm.

4. Wait for 60 seconds > tap on your WiFi Network > enter WiFi Network Password to join the Network.

5. Disable WiFi Networking Service

Some users have reported fixing this issue by disabling WiFi Networking service.

1. Go to Settings > Privacy > Location Services.

Location Services Settings Option on iPhone

2. On the next screen, scroll down and tap on System Services.

System Services Settings Option On iPhone

3. On system services screen, disable Networking & Wireless option.

6. Restart Modem/Router

In above steps did not help, the problem might be due to a glitch in Modem/Router.

1. Switch OFF the Power Supply to Modem/Router – Use the ON/OFF button (if available) or unplug the power cable from wall socket.

2. Wait for 60 seconds and switch ON the Power Supply to Modem/Router.

7. Reset Network Settings

Note down your WiFi Network Password and follow the steps below to Reset Network Settings on your iPhone to original or Factory Default settings.

1. Go to Settings > General > on the next screen, scroll down to bottom and tap on Reset.

Reset Option on iPhone General Settings Screen

2. On the next screen, tap on Reset Network Settings option.

Reset Network Settings Option on iPhone

3. On the confirmation pop-up, tap on Reset Network Settings again confirm.

After this, connect your iPhone to WiFi Network again and see if the problem of iPhone not connecting to WiFi is gone.

8. Switch to Google DNS

Switching to Google DNS can help if the problem is due to the DNS server of your Internet Service Provider being busy or going through problems.

To use Google DNS, you can refer to this guide: How to Use Google DNS On iPhone and iPad

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