SOS Only means your iPhone cannot get full cellular service from your carrier. It may still be able to place an emergency call using another carrier’s network, if one is available. It does not mean your iPhone is connected to a satellite. Emergency SOS via satellite is a separate emergency messaging option for supported iPhones when cellular and Wi-Fi are unavailable and a regular emergency call cannot connect.
How SOS Only and Emergency SOS via satellite differ
| Feature | What it means | What to do |
|---|---|---|
| SOS Only | Your iPhone lacks full cellular service from your own provider. An emergency call may still connect through another carrier if one is available in your location. Apple explains the iPhone status icons and emergency calling when your carrier’s network is unavailable. | If you need emergency help, try calling emergency services. The status indicator by itself does not show that a satellite connection is active. |
| Emergency SOS via satellite | A satellite-based emergency text flow for compatible iPhones, used when cellular and Wi-Fi are unavailable and an ordinary emergency call does not connect. Apple’s satellite instructions describe the process. | Try an emergency call first. If it fails, follow the iPhone’s prompts to use Emergency Text via Satellite, where the feature is available. |
What SOS Only means on an iPhone
SOS Only is a cellular-service status: your phone is not receiving full service from your own provider. It does not, on its own, tell you whether another carrier has coverage or whether satellite service is available. Depending on local network availability, the iPhone may still be able to call emergency services over another carrier’s network.
So, if you see SOS or SOS Only and need urgent help, do not assume that the indicator means you have no way to call. Try the emergency call. If it cannot connect and your iPhone and location support satellite service, use the satellite option presented on your phone.
What Emergency SOS via satellite does
Emergency SOS via satellite lets a supported iPhone send emergency information by satellite when there is no cellular or Wi-Fi coverage and a regular emergency call cannot connect. The phone guides you through a short questionnaire and a text exchange with emergency services. Apple says the flow can share your answers, location (including elevation), and battery level; Medical ID and emergency-contact details may also be shared if you have configured them. Availability and the information shared depend on the service and your settings. See Apple’s instructions for using Emergency SOS via satellite.
#1 Best Overall
- Global satellite messaging: Stay connected beyond cell coverage, use ZOLEO with your smartphone to transmit text messages and e-mails over the Iridium satellite network, cellular or Wi-Fi using the lowest-cost network available (service plan required)
- Emergency SOS: Send an SOS alert with your GPS location to 24/7 emergency monitoring center if something goes wrong, or access Medical Assist for non-emergency help
- Optional Travel Risk Management Coverage: Feel more secure wherever you go with a Field Rescue Membership from Global Rescue. Affordably priced, this travel risk management add-on offers immediate medical coverage for safe extraction and transportation to the nearest capable medical facility.
- Dedicated SMS number: An assigned ZOLEO SMS number and email enables contacts to reach out directly when you're off the grid
- Check-in: Send unlimited check-ins via the ZOLEO device or app, included in your plan
Satellite messaging needs a clear view of the sky and horizon. Buildings, terrain, and dense foliage can obstruct the connection. Apple advises: “To help you connect to a satellite, make sure that you’re outside with a clear view of the sky and horizon.”
How to use satellite emergency messaging
- Try calling emergency services first. Apple’s guidance is to attempt an emergency call even if your carrier network is unavailable.
- If the call will not connect, follow the on-screen satellite prompts. Choose Emergency Text via Satellite when it is offered, answer the questions, and follow the iPhone’s directions to connect.
- Move to a place with an unobstructed view. Go outdoors if possible, with a clear view of both sky and horizon, and follow the positioning instructions on screen.
- Stay in the session and respond. Keep the iPhone available for messages from the responder and provide the requested information.
Requirements and availability
Emergency SOS via satellite is available on iPhone 14 or later, but a compatible model alone is not enough. Apple’s current availability guidance lists supported locations and region-specific minimum iOS versions; local approvals and market requirements can also affect access. The service also requires that cellular and Wi-Fi are unavailable, a normal emergency call cannot connect, and the phone can establish a satellite link. Check Apple’s current satellite feature availability information for your country or region and software requirements before relying on the feature. These details can change.
Rank #2
- Small, rugged, lightweight satellite communicator enables two-way text messaging even in areas with no cell coverage (Active satellite subscription required. Some jurisdictions regulate or prohibit the use of satellite communication devices)
- Send two-way messages globally; easily text back and forth directly with friends via the Garmin Messenger app, even when you’re out of cellular coverage. (Active satellite subscription required. Some jurisdictions regulate or prohibit the use of satellite communication devices.)
- Group messaging via the Garmin Messenger smartphone app lets you share your adventures with multiple contacts simultaneously — and have group text chats with friends and family
- Check in with contacts directly by using preset messages that do not count toward your allotted text messages (Active satellite subscription required. Some jurisdictions regulate or prohibit the use of satellite communication devices)
- Share your GPS location (Active satellite subscription required. Some jurisdictions regulate or prohibit the use of satellite communication devices)
Prepare before traveling somewhere remote
- Set up Medical ID and add emergency contacts so relevant details can be shared if needed.
- Use the Emergency SOS via satellite demo in Settings to learn the connection flow before you travel. The demo does not place a real emergency call.
- Know that obstructions can prevent a satellite connection, even on a compatible iPhone.
If you start an emergency call or satellite session by mistake
Do not hang up or end the session. Apple says to wait for a responder to answer and then explain that you do not need help. In its user guide, Apple states: “If an emergency call has been made and you don’t need emergency services, don’t hang up. Wait until a responder answers, then explain that you don’t need help.”
Quick Recap
Best Value
- Compact, lightweight satellite communicator enables two-way messaging and interactive SOS globally (Active satellite subscription required. Some jurisdictions regulate or prohibit the use of satellite communication devices.).Special Feature:Bluetooth.Water Resistant: Yes
- Navigate back to where you started by using TracBack routing
- Share your location with loved ones back home at any time (active satellite subscription required) by using your MapShare page or with your coordinates embedded in your messages
- Get accurate heading information using the digital compass — even when you’re not moving
- Sync with the Garmin Explore app and website on your compatible smartphone for trip planning and topographical mapping, and create waypoints, courses, activities and collections you can sync to your device
Rank #4
- Always connected: Travel beyond cell coverage with the safety and preparedness platform that delivers peace of mind, everywhere. Pair ZOLEO with your smartphone and stay connected with your Safety Circle, including adventurers, loved ones, and work teams responsible for duty of care. Send text messages and emails over the Iridium satellite network, cellular, or Wi-Fi using the lowest-cost network available (service plan required).
- Refreshed design: Stay connected with the ZOLEO experience you trust, now with a fresh new colour for easy identification, USB-C charging for compatibility with universal cords, and faster, more secure Bluetooth pairing.
- Instant Emergency SOS: SOS activates immediately on button press with no countdown delay. Connects to 24/7 emergency monitoring center. Access Medical Assist for non-emergency help.
- USB-C charging: Charges via universal USB-C, compatible with most cables, power banks, and car chargers.
- Optional Travel Risk Management Coverage: Feel more secure wherever you go with a Field Rescue Membership from Global Rescue. Affordably priced, this travel risk management add-on offers immediate medical coverage for safe extraction and transportation to the nearest capable medical facility.
Rank #3
- Service plans required - as low as $4.99 per month for SOS satellite assist
- Provides advanced 2-way satellite-enabled messaging. Compatible with iOS 14 and Android 10 and later smartphones
- Stay in contact wherever you go—reliable satellite coverage keeps you firmly on the grid even if you're off the edge of the map, ensuring you're in touch with those who matter
- Simply press the check-in button and send your coordinates or a message to your loved ones, giving them peace of mind whilst you do your thing
- SOS assist allows you to check in and trigger SOS without a connection; unlimited SOS included with every service plan
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