I ordered S21 Ultra in titanium. The delivery states 2-4 weeks but I have received an e-mail saying it could be up to 5 weeks. I am supposed to claim £150 gift card within 30 days of purchase (not delivery). It requires IMEI. Is it possible to claim the voucher before delivery? I am ok if it can be claimed straightaway but is accessible only after phone arrival, just don't want to miss out on the promotion due to delivery delays.