Do these 3 things before closing this tab:
1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesIf cellular service is gone but Wi-Fi works, connect to Wi-Fi and send a message through an internet messaging app. To send from your phone number, check whether your carrier and phone support Wi-Fi calling or texting and set it up before you lose coverage. With neither Wi-Fi nor cellular service, ordinary SMS cannot send; a supported iPhone can send certain messages by satellite in some countries, while the Pixel satellite feature documented by Google is for emergencies.
First, check whether you have Wi-Fi
Connect to a working Wi-Fi network, then use a messaging service that sends over the internet. Both you and the recipient need access to that service; it does not matter whether your phone has cellular bars.
| # | Preview | Product | Price | |
|---|---|---|---|---|
| 1 |
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ZOLEO Satellite Communicator (Slate Grey) | Buy on Amazon | |
| 2 |
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Spot X with Bluetooth 2-Way Satellite Messenger | $249.95 | Buy on Amazon |
| 3 |
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Garmin inReach® Messenger Satellite Communicator, Global Two-Way Messaging | $273.08 | Buy on Amazon |
| 4 |
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Spot Gen 4 Satellite GPS Messenger | $149.95 | Buy on Amazon |
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If you specifically want to communicate through your carrier number, ask your carrier whether your phone supports Wi-Fi calling and texting, how to enable it, and whether charges apply. Support depends on the carrier and device, so do not assume that connecting to Wi-Fi automatically enables carrier-based messages. Google’s Wi-Fi calling guidance likewise advises checking with your carrier about availability and possible charges.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchWhy ordinary SMS will not send without a connection
SMS and MMS use carrier messaging service; an internet messaging app uses an internet connection instead. If your phone has no cellular connection and no Wi-Fi internet, opening its default messaging app does not create a route for an ordinary text. Google’s Google Messages troubleshooting guide recommends checking signal, carrier support for SMS/MMS/RCS, and plan balance when messages fail.
#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
Send a message by satellite on a supported iPhone
Check that your iPhone and location qualify
Apple documents Messages via satellite for iPhone 14 or later in the United States, Canada, Mexico, and Japan. The minimum software version differs by country: iOS 18 or later in the United States, Canada, and Japan, and iOS 18.4 or later in Mexico. An active SIM is required. Sending SMS by satellite also requires carrier support; availability and fees can vary. Check Apple’s current Messages via satellite requirements and your carrier’s terms before relying on the feature.
Prepare and connect
- Before leaving coverage, turn on iMessage and confirm your SIM is active.
- When there is no cellular or Wi-Fi coverage, open Messages and follow the satellite prompt.
- Go outside and follow the iPhone’s positioning instructions. You need an unobstructed view of the sky and horizon; trees or other obstacles can prevent a connection.
- Send the message and allow extra time for it to be delivered. Apple describes the connection flow in its iPhone satellite messaging guide.
Expect delays and limited message types
Apple gives an approximate delivery time of 30 seconds in ideal clear-sky conditions; light or medium foliage may extend delivery to over a minute. These are estimates, not a guarantee. Messages via satellite does not support photos, videos, audio messages, stickers, or group messages. SMS availability depends on carrier support.
Rank #2
- SYNC WITH BLUETOOTH: Connect to SpotX to cellphone so you can communicate with family or even search and rescue; Use as a standalone communication device with it's own dedicated US mobile number to receive messages
- PEACE OF MIND: Send S.O.S. to 24/7 Search & Rescue service, message back and forth about the nature of your emergency, receive confirmation when help is on the way; Message any cell number or email address virtually anywhere
- GLOBALSTAR SATELLITE & SPOT products use GPS to determine location and transmit GPS coordinates to others; SPOT users can notify friends, family or emergency rescue their exact GPS coordinates
- WHAT'S IN THE BOX: SpotX Device, strap and carabiner, micro usb data/power cable, quick start guide, SOS mirrored sticker, warranty card and kickstand
- PURCHASE, ACTIVATE, EXPLORE: Grab a Spot X 2-way Satellite Messenger; Activate by selecting your service plan; Get out there and explore the world with peace of mind
Do not confuse emergency satellite service with ordinary texting
Apple explicitly warns: “Messages via satellite shouldn’t be used in emergencies.” For an emergency on a supported iPhone, use Emergency SOS via satellite instead.
Google’s Pixel Satellite SOS is also an emergency feature, not a way to text friends or family. Google lists it for Pixel 9, Pixel 9 Pro, Pixel 9 Pro XL, and Pixel 9 Pro Fold in the United States, excluding Hawaii and Alaska. See Google’s Pixel emergency help information for the supported devices and service details.
Quick Recap
Rank #4
- MEANT FOR ADVENTURE: Spot Gen4 provides critical, life-saving line of communication when you travel beyond cell towers; Let family know you're ok or push the SOS button to send your GPS to emergency responders if you need help
- NO CELL PHONE OR SERVICE-NO PROBLEM: With the Tracking feature Gen4 can transmit location updates when you are moving and when you stop; Keep one in your child's backpack for the walk home
- GLOBALSTAR SATELLITE & SPOT products use GPS to determine location and transmit GPS coordinates to others; SPOT users can notify friends, family or emergency rescue their exact GPS coordinates
- WHAT'S IN THE BOX: SPOT Gen4 device, Strap and Carabiner, USB Cable, Batteries and quick start guide; Subscription required; Two service plans available
- PURCHASE, ACTIVATE, EXPLORE: Grab a Spot Gen4; Activate by selecting your service plan; Get out there and explore the world with peace of mind
Rank #3
- 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)
Which option fits your situation?
| Option | What you need | What it can do | Main limitation |
|---|---|---|---|
| Internet messaging over Wi-Fi | Working Wi-Fi internet and a supported app/account | Send app messages over internet data | Does not work without an internet connection |
| Carrier Wi-Fi calling or texting | Compatible phone, participating carrier, enabled feature, and Wi-Fi | May let you communicate through your carrier over Wi-Fi | Support and possible fees depend on the carrier |
| Apple Messages via satellite | iPhone 14 or later, supported region and software, active SIM; carrier support for satellite SMS | Send iMessage or supported SMS when cellular and Wi-Fi are absent | Needs a clear view of the sky; delivery can be slow and message types are limited; not for emergencies |
| Pixel Satellite SOS | Listed Pixel 9 models in the supported United States region | Contact emergency services | For emergencies only, with limited device and geographic availability |
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
