Currently, using Messages via satellite on iPhones (iPhone 14 and later) is free for a limited time. Apple has stated that this feature will be available at no cost for two years after the activation of the device. This is similar to their Emergency SOS via satellite service, which also started as a free offering[1][2][3].
While Apple has not specified any costs associated with Messages via satellite beyond this promotional period, they have indicated that they plan to charge for satellite services in the future. However, no specific pricing details have been released yet[3][6][7].
In summary, there are no immediate costs for using Messages via satellite, but potential charges may be introduced after the initial two-year free period.
Citations:[1] https://www.tomsguide.com/phones/iphones/apples-message-via-satellite-works-just-like-imessage-and-itll-be-free-to-start-with
[2] https://support.apple.com/en-us/120930
[3] https://www.macrumors.com/2024/06/10/you-can-send-texts-via-satellite-in-ios-18/
[4] https://www.theverge.com/2024/8/29/24230867/verizon-satellite-messaging-service-skylo
[5] https://www.reddit.com/r/gadgets/comments/1dgqjwb/how_messages_via_satellite_will_work_on_ios_18/
[6] https://www.timesnownews.com/technology-science/ios-18-iphone-users-can-now-send-text-messages-via-satellite-here-is-how-article-110892479
[7] https://9to5mac.com/2024/06/12/iphone-sms-satellite-apple-charge/
[8] https://www.engadget.com/how-messages-via-satellite-will-work-on-ios-18-and-how-much-it-will-cost-130020976.html