How do I register and use coupons in Galaxy Store?

Please refer to the instructions below regarding coupon use:

• You can only use one coupon for each purchase.
  
• Expired coupons cannot be refunded or kept for future purchases.
• If you cancel payment before downloading an app, unused coupons are returned.
• If you purchase an app that exceeds the coupon amount, you can pay the difference with other payment methods such as a credit card or mobile phone payment. Apply the coupon first before paying the difference with another payment method.