AALTO connects a ground 4G device through Zephyr in Kenya
AALTO completed direct-to-device connectivity tests linking a ground 4G handset and gateway through Zephyr while it flew continuously above 60,000 feet.

Evidence notes
- The campaign was conducted for Space Compass with NTT DOCOMO as partner.
- Testing included a telephone call routed from Kenya through Zephyr to the United Kingdom.
- AALTO measured throughput, signal quality and other payload-performance characteristics.
Company context
AALTO designs, manufactures and operates the solar-powered Zephyr high-altitude platform for stratospheric Earth observation, government missions and communications services.