A usable promo code must fulfill these criteria:
1) The promo code needs to be active - We release promo codes during specific dates or events, always available for a limited period of time or number of uses. This detailed information is presented on our blog or in the newsletter.
2) The promo code needs to be valid - Only our own released promo codes can be used.
Unfortunately, we cannot apply a discount retroactively.
We believe the device is worth every penny of its original price, so we hope you won't feel too bad about buying it for full price like many other satisfied customers have.