"Purchase a Galaxy S25, S25+, or S25 Ultra from Samsung.com between 22/01/25 and 06/02/25. We will email you a link to complete a review form after the 14- day returns period has expired. You must review your phone using that link within 30 days of receiving your new handset, using the same email address you used to place your order. You will not receive a confirmation email once you have submitted your review. Once your review has been validated, we will deliver your free gift within another 30 days"
As mentioned above, once you've had your delivery, watch out for an email from Samsung inviting you to complete a review.
Officially the email should come after 14 days from delivery but I got mine 14 days from date of order.
Full in the review and once you submit you'll get a message on screen confirming you'll get the 15w wireless charger and case delivered within 30 days.