Normally, the military discounts programs on some occasions of the year. In order to know whether it is offered or not is depended on Whistle's policy sales, you can visit the store now for your reference.

On some big events such as Black Friday, Valentine's Day,... Whistle will constantly offer up to 50% discount or more, so all customers can purchase well on their budget without worry.

In case you enter a discount code during checkout that doesn't exist or isn't currently active, then you can see the message: “Unable to find a valid discount matching the code entered”.

Discount codes don't stack. If you have 58% off discount, they can't also use a "free shipping" coupon since Only one discount at a time can apply to a single order at the Whistle site.

Shoppers can get coupons for their first purchase at the store. However, it is not all the time, sometimes, they cannot apply a discount on items selling out or items not contained in the promotion program. It depends on the time you shop at Whistle.