The Messages via satellite feature differs from the existing Emergency SOS via satellite service offered by Apple in several ways:
Purpose: Messages via satellite is designed for general communication with friends and family, while Emergency SOS via satellite is specifically for emergency situations where users need to contact authorities for help.
Message types: Messages via satellite allows users to send standard iMessages to other iPhone users and SMS messages to Android users, whereas Emergency SOS via satellite only supports text messages to emergency services6.
Availability: Messages via satellite is a new feature that will be available in iOS 18 for iPhone 14 and iPhone 15 users, while Emergency SOS via satellite has been available since the launch of iPhone 14 models5.
Interface: Messages via satellite has a different user interface, providing a notification when there is no cellular or Wi-Fi signal, and allowing users to send messages, call for roadside assistance, use the Find My app, or use Emergency SOS via satellite.
Limitations: Messages via satellite does not support sending photos or videos due to their large file sizes, while Emergency SOS via satellite focuses on providing critical information like location and emergency details to authorities.
In summary, Messages via satellite is a more general communication feature for off-the-grid situations, while Emergency SOS via satellite is specifically designed for emergency situations.
At Apple's Worldwide Developers Conference, a new feature for the iPhone 14 and iPhone 15 was announced called "Messages via satellite12." This feature will allow users to send iMessages via satellite when they don't have cell service or Wi-Fi connection. The service will be available in iOS 18 and requires an iPhone 14 or newer.
To use the Messages via satellite feature on an iPhone, you will need the following:
An iPhone 14 or later model: The feature is only available on the iPhone 14 and later devices, including the iPhone 14 Pro and iPhone 15 models5.
iOS 18 or later: The Messages via satellite feature will be introduced in iOS 18, so you will need to update your iPhone to the latest software version to access the feature.
Clear line of sight to the sky: Since the feature relies on a satellite connection, you will need to be outdoors with a clear view of the sky and the horizon to connect to a satellite. Obstructions such as tall buildings, mountains, dense foliage, and other objects can block satellite connectivity.
Satellite connectivity: Your iPhone must have compatible software to connect to a satellite. When you have no cellular or Wi-Fi coverage, you can use a satellite connection to text emergency services, request roadside assistance, and share your location with friends and family1.
Availability in your country or region: The feature will initially be available in the US before expanding to more countries.
It's important to note that the feature is designed to work with iMessage and SMS messages, but does not support sending or receiving photos or videos due to their larger data size. Additionally, the feature works for one-on-one conversations and does not support group chats.