To resolve the issue of your DayBand not connecting to your iPhone 12, you can follow these detailed steps:

1. Check Bluetooth: Ensure that Bluetooth is enabled on your iPhone 12. Open the Settings app, tap on Bluetooth, and make sure the toggle is switched to ON.

2. Restart Your Phone: Sometimes, minor glitches can occur. Restart your iPhone 12 to refresh the system and try connecting again.
- To restart, hold down the side button until the power off slider appears, then slide to power off. After your phone turns off, press and hold the side button again until the Apple logo appears - learn more.

3. Put DayBand in Pairing Mode: Make sure your DayBand is in pairing mode. This usually involves pressing and holding a specific button on the device (refer to your DayBand manual for exact steps) - learn more.

4. Forget Old Connections: If your DayBand has been previously paired with your iPhone or another device, you may need to forget that connection. Go to Settings > Bluetooth, find your DayBand in the list of devices, and tap the "i" icon. Select "Forget This Device".

5. Reset Network Settings: If the above steps don't work, you may want to reset your network settings. Go to Settings > General > Reset > Reset Network Settings. This will clear all your Wi-Fi passwords and Bluetooth connections, so be prepared to re-enter them - learn more.

6. Pair the Devices: After ensuring the DayBand is in pairing mode and restarting your iPhone, revisit the Bluetooth settings. Look for your DayBand in the list of available devices and select it to initiate pairing.

7. Check for App Updates: Make sure the DayBand app is updated. Open the App Store, go to Updates, and check if there is an update available for the DayBand app. Keeping the app up-to-date can resolve connection issues - learn more.

8. Contact Support: If you've exhausted these options and the DayBand still won't connect, consider reaching out to DayBand support for further assistance.

Following these steps should facilitate a successful connection between your DayBand and iPhone 12. If issues persist, checking the official support channels or forums may provide additional solutions or insights - learn more.