- Go to the Airplane Mode option under Settings.
- After that, flip the Airplane Mode switch to the ON position. The phone's wireless radios will be turned off as a result.
- Reboot/soft reset your iPhone when it is in Airplane Mode.
- Return to the Settings->Airplane Mode menu.
- Toggle the Airplane Mode switch to the off position to turn it off.
After you've turned off Airplane Mode, go to Settings and activate WiFi, then join or connect to your WiFi network.