When a hurricane in Florida knocked out the power for 13 days where Eric Talman’s mother lived, she was able to call him on her satellite phone to keep in touch and let him know she was safe.
This experience, however, hit close to home.
Talman was relieved when his mother was able to use her sat phone to reach him in the aftermath of the hurricane, but it raised another question in his mind. If the person you’re trying to call has a cellphone, how are you going to communicate if cellphone connectivity is down on a wider scale?
Today, “[there are] lots of network jams—internationally and domestically,” he said.
He isn’t alone in his concerns. In the United States, interest in satellite phones has shot up since early this year, as Americans are looking to find alternative and reliable ways of communications. Talman sees the greatest interest coming from Texas, as well as California, Florida, New York, Colorado, and the Northeast—where ice storms cause rolling power outages in wintertime.
To prepare for potentially wider loss of connectivity issues, having sat phones as back-ups across different households, as Talman and his parents do, has also become part of many families’ emergency preparedness plans.
How Do Sat Phones Work?
Unlike cellphone technology, satellite phones rely on different frequencies—closer to those used by GPS—and different infrastructure.From a sat phone, the data travels up directly to a satellite in space before being relayed to a ground station back on Earth. From there, the call or text can be routed just like a cellphone call—whether that’s to another sat phone, a landline, or a cellphone.
And here’s where it gets interesting: If both the caller and recipient use sat phones from the same service provider, the call can bounce back to space and actually never leave the provider’s network, even if the participants are connecting from opposite sides of the planet. In that case, they’d never have to rely on infrastructure used for cellphone connectivity.
Cellphone transmissions, on the other hand, connect to a cellular tower before bouncing through numerous ground networks on the way to their destination.
In case of a widespread power outage, some satellite phones, such as the Inmarsat IsatPhone 2, have a battery life that can last up to a week. Beyond that time frame, they need recharging, but it could be from any source—power banks, car, solar, and so on.
Unlike cellphones’ built-in obsolescent nature, they are meant to last; there are perfectly usable sat phones that have been in service since 2006, for example. The devices are more robust because they’re made to function outdoors—an open sky is critical when connecting to satellites that are hundreds or thousands of miles away, though cloud cover isn’t a problem. In situations where going outdoors is inconvenient, terminals can be installed to provide connectivity for devices under cover.
Privacy Concerns
Privacy and censorship concerns have fueled more interest in sat phones.Smartphones, with apps that may potentially relay a user’s location and cellphone activity to a third party, pose privacy risks.
Satellite phones, which are simpler by nature, rarely have those third-party apps, and the GPS tracking is opt-in only. All voice calls are also encrypted.
For some, satellite phones aren’t just about keeping in touch with loved ones or reaching emergency help if needed, but about free speech and keeping the flow of information unrestricted and uncensored.