Each MyTrendyPhone Discount Codes has a different expiration time, you can select MyTrendyPhone Promo Codes you want to use to redeem the discounts when making the payment. There are also some MyTrendyPhone Coupon Codes that have a limited range of use, so you should also use it within the range. Such as a certain type of products, when the type of product has been sold out, then your MyTrendyPhone Discount Codes is invalid.