Iphone 11 acts normal for a while then wifi turns off and can’t turn back on

Hello faizzafzal,

We understand that Bluetooth and Wi-Fi are turning off and you’re unable to turn the features back on. You’ve come to the right place. We’re happy to help. You’ve completed some great troubleshooting steps so far. First, we’d like to be sure that you’re running the latest software version. Here’s how to check: Update iOS on iPhone

To clarify, does this occur while both features are enabled in the Control Center as shown here: Use Bluetooth and Wi-Fi in Control

Center

Thank you for using Apple Support Communities. We're here if you need us!

 faizzafzal,

Thanks for providing us with those details. Let's force restart your phone to see if that helps. Here's how: Force restart iPhone

If you continue to experience the same behavior, we'd like to verify if the issue is software related. To do so, we'll need to secure your data with a backup if you do not have a recent one. How to back up your iPhone, iPad, and iPod touch

Once the backup is complete, we'd like to restore your iPhone to factory default settings. This will remove the data from your iPhone, however, it will still be safe with the backup you've created. At this time we will not restore your backup to your device. After you set up your device as new, test the issue. Restore your iPhone to factory settings using this guide: Restore your iPhone, iPad, or iPod to factory settings

After testing the issue, you can restore your phone once again and restore the backup to your phone. Completing this step allows us to determine if the issue is stored in your backup as well.

Best wishes!