Iridium Prepaid and Postpaid SIM Cards are available at no charge with free delivery to any US address via USPS Priority Mail. Activate when ready! It's that simple. If you're purchasing an Iridium satellite phone, plans marked Promo are eligible for special hardware discounts. Excel spreadsheet bill presentation is available upon request for postpaid plans. Courtesy email reminders are sent shortly before your prepaid account expires. Annually-billed plans are available to government and corporate customers; please call for more information.