This seems to be a pretty widespread issue. I signed up for LTE home service on Cyber Monday to take advantage of the Amazon Giftcard and Xbox Series S. The documentation says I must claim these within 60 days and the Xbox can be in-hand as soon as December 1, while the giftcard will be delivered 24-48 hours after registering. It says I will receive instructions after activating the service, but I have not received instructions on either one. This is frustrating and seems to be a common problem.