If a Custom Earpiece coupon code isn't working, try the following steps:
- Check the expiration date of the coupon code.
- Ensure the code is entered correctly, without any typos.
- Verify the terms and conditions of the coupon, such as minimum purchase requirements or specific product exclusions.
- Clear browser cookies and cache, then try applying the code again.
- Try a different coupon code if the current one is invalid or expired.
- Contact customer support for assistance with the coupon code.