Hi G_7567,
Since you're having difficulty connecting your Evo Headphones to your iPhone, we recommend that you try the steps here: If you can't connect a Bluetooth accessory to your iPhone or iPad
To perform the recommended troubleshooting steps via the link above, complete the steps in the section titled "Try these steps first."
To get help pairing a Bluetooth accessory, like a wireless keyboard, to your iOS or iPadOS device:
1) Make sure that your Bluetooth accessory and iOS or iPadOS device are close to each other.
2) Turn your Bluetooth accessory off and back on again.
3) Make sure that your Bluetooth accessory is on and fully charged or connected to power. If your accessory uses batteries, see if they need to be replaced.
4) If there's an app that you use with the Bluetooth accessory, go to Settings > Privacy & Security > Bluetooth on your iOS or iPadOS device, and make sure that you've turned on Bluetooth for the app.
We recommend the steps above because they will show you what to do if your Bluetooth accessory won't pair or connect to your iPhone.
If you’re still experiencing the same issue, try the steps in the section below.
* If you previously connected your Bluetooth accessory to your iOS or iPadOS device, unpair the accessory, put it back in discovery mode, then try to pair and connect itagain.
* If you can pair your accessory with some devices but not your iOS or iPadOS device, unpair the accessory from your other devices. Then try to pair with your iOS or iPadOS device again.
*To find out whether your accessory is compatible with your iOS or iPad OS device, contact the manufacturer of the accessory.
*If you still have any of these issues, contact Apple Support:
*You can’t turn on Bluetooth or the setting is grayed out.
*You can’t connect any Bluetooth accessories with your device.
*The accessory manufacturer confirmed that your accessory is working correctly.
Please let us know the outcome after giving the above steps a try.
Thanks for using the Apple Support Communities.
Cheers!
