To troubleshoot issues connecting your Quest 2 headset to your smartphone, make sure you have tried the following:
Ensure the phone's Bluetooth is turned on and the headset is turned on.
Turn both the phone and headset off and on again
Clear app cache on your phone
To clear app cache on an iPhone:
Open Settings
Select "General" and then "iPhone storage"
Select the Oculus app and "Offload App"
To clear app Cache on an Android:
Open the Settings application on your smartphone
go to the Apps Menu.
Choose Installed Applications.
Find the Oculus application
Select it and go to the Storage Tab.
Select Clear App Cache.
Uninstall and reinstall the Oculus app on your smartphone
Ensure the phone and headset are connected to same wireless network
Factory reset the headset:
Turn off your headset.
Hold the power and volume (-) buttons on your headset down simultaneously until the boot screen loads on your headset.
Use the volume buttons on your headset to highlight Factory Reset and press the power button.
Use the volume buttons on your headset to highlight Yes and press the power button.
Notes:
Performing a factory reset is irreversible and will remove all account information, downloaded games and content from the headset.
Performing a factory reset won't remove content you've purchased or downloaded from your account.