To resolve the issue of not being able to set up a new account on the BAND app, follow these steps:

1. Check Your Internet Connection: Ensure your device has a stable internet connection. Try switching between Wi-Fi and mobile data to see if that resolves the issue.

2. Update the BAND App: Make sure you are using the latest version of the BAND app. Open the App Store, search for BAND, and check for any available updates. Download and install if needed.

3. Clear Cache (if applicable): Although iOS does not have a traditional cache clearing option, you can try deleting the app and reinstalling it. Hold down the app icon until it wiggles, tap the “X” to delete it, then reinstall from the App Store.

4. Restart Your Device: Sometimes, a simple restart can solve setup issues. Turn off your iPhone and turn it back on.

5. Create an Account Using Different Methods: If you are using an email address, try signing up using a different method, such as your Facebook or Apple ID. Make sure you have access to the selected account.

6. Check for Errors: If you receive any error messages during the sign-up process, take note of them. Some issues may relate to personal information not meeting the registration criteria, such as password requirements or age restrictions.

7. Ensure Compliance with Account Requirements: Make sure that you fulfill any age restrictions or terms of use specified by the BAND application. If you encounter issues related to using an Apple ID, ensure that the Apple account is not restricted from creating new accounts - learn more.

8. Try Alternative Devices: If the problem persists, attempt to set up your account using another device to rule out device-specific issues.

9. Contact Support: If you’ve tried all the above and still cannot set up an account, reach out for help. You can visit the BAND help page for troubleshooting guides or contact their support directly - learn more.

Following these steps should help you to successfully set up a new account on the BAND app. If you experience further issues, detailed error messages can help in diagnosing the precise problem.