How do I put the phone in discovery mode

Hello Sleestak1,

Thanks for posting in the Apple Support Communities!

When you go to Settings > Bluetooth, the iPhone should be discoverable when Bluetooth is turned on. You should see a message just below the toggle stating the iPhone is discoverable with its name. Should you need additional assistance with pairing a device via Bluetooth, check out the following steps: If you can't connect a Bluetooth accessory to your iPhone, iPad, or iPod touch - Apple Support

If you still can't pair or connect your Bluetooth accessory

1. 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 it again.

2. 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.

3. Check with the accessory manufacturer to make sure that your accessory supports your iOS or iPadOS device.

4. 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.

If you need additional assistance, provide more details on what device you're pairing with your iPhone. Include any error messages you may see as well.

Have a great day!