Data Plans Data plans are required for all devices/solutions except the basic Iridium 9555 satellite phone. Data plans provide Iridium network access for tracking, messaging, etc. and the SkyRouter Command Center
Voice Plans Voice plans are required for devices/solutions that offer voice communications. This includes satellite phones and the D1000 products with the ACH1000 telecom integration option
GSM Plans GSM cellular plans are required for the HawkEye 5300 and HawkEye PT Plus, in order to take advantage of both GSM cellular and the Iridium satellite network.