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AST's BlueWalker Satellite Achieves 14Mbps Download, 5G Voice Call

AST SpaceMobile beams internet to a phone in a remote area of Hawaii, while a Samsung Galaxy S22 makes a phone call from a 'wireless dead zone' in Hawaii using AT&T’s 5G radio spectrum.

 & Michael Kan Principal Reporter

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A prototype satellite that can beam internet to unmodified smartphones has reached a new record, delivering a 14Mbps download rate.  

The satellite’s developer, AST SpaceMobile, completed the test last month, which involved beaming the internet to a phone located in a remote area of Maui, Hawaii. The result allowed the phone to conduct a video call using 4G spectrum. 

In a separate test this month, a Samsung Galaxy S22 handset was also able to make a phone call from a “wireless dead zone” in Hawaii to Spain using AT&T’s 5G radio spectrum via the orbiting satellite. That’s a bit ironic considering AT&T is still working to bring voice over 5G to its ground-based cellular networks. 

Video of the phone call shows the satellite offering clear audio quality. Vodafone and Nokia also helped facilitate the test.

AST SpaceMobile has been powering the space-based phone calls and broadband through the BlueWalker 3 test satellite, which launched last November. The satellite boasts the largest communication array in low-Earth orbit, allowing it to operate as a cell tower in space.   

Earlier this year, the BlueWalker 3 satellite completed a phone call using an unspecified radio band and then a 10Mbps download using 4G spectrum. The most recent test shows the technology can also tap 5G radio spectrum from AT&T. 

“Since the launch of BlueWalker 3, we have achieved full compatibility with phones made by all major manufacturers and support for 2G, 4G LTE, and now 5G,” said AST SpaceMobile CEO Abel Avellan in the announcement

There’s still no word on other specs, such as latency or coverage limitations. But the technology promises to make it easier for users to access the internet from remote areas. “These speeds, beyond supporting basic voice and text, also enable browsing the internet, downloading files, using messaging apps, streaming video, and more on everyday smartphones,” AST SpaceMobile added. 

The goal is to start offering commercial service sometime next year. To build out the network, the company plans on launching five finalized “BlueBird” satellites in the first quarter of 2024. Last month, AST SpaceMobile also announced it had secured another $115 million in financing through loans to help it build additional BlueBird satellites.

About Our Expert

Michael Kan

Michael Kan

Principal Reporter

My Experience

I've been a journalist for over 15 years. I got my start as a schools and cities reporter in Kansas City and joined PCMag in 2017, where I cover satellite internet services, cybersecurity, PC hardware, and more. I'm currently based in San Francisco, but previously spent over five years in China, covering the country's technology sector.

Since 2020, I've covered the launch and explosive growth of SpaceX's Starlink satellite internet service, writing 600+ stories on availability and feature launches, but also the regulatory battles over the expansion of satellite constellations, fights with rival providers like AST SpaceMobile and Amazon, and the effort to expand into satellite-based mobile service. I've combed through FCC filings for the latest news and driven to remote corners of California to test Starlink's cellular service.

I also cover cyber threats, from ransomware gangs to the emergence of AI-based malware. In 2024 and 2025, the FTC forced Avast to pay consumers $16.5 million for secretly harvesting and selling their personal information to third-party clients, as revealed in my joint investigation with Motherboard.

I also cover the PC graphics card market. Pandemic-era shortages led me to camp out in front of a Best Buy to get an RTX 3000. I'm now following how the AI-driven memory shortage is impacting the entire consumer electronics market. I'm always eager to learn more, so please jump in the comments with feedback and send me tips.

The Best Tech I've Had:

  • My first video game console: a Nintendo Famicom
  • I loved my Sega Saturn despite PlayStation's popularity.
  • The iPod Video I received as a gift in college
  • Xbox 360 FTW
  • The Galaxy Nexus was the first smartphone I was proud to own.
  • The PC desktop I built in 2013, which still works to this day.

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