Belfast, UK/ Shenzhen, China – Ulefone, the leading rugged smartphone manufacturer, revealed the technology behind its flagship rugged Armor 23 Ultra smartphone’s two-way satellite connectivity made possible through Kigen eSIM OS and Skylo’s non-terrestrial satellite network. The smartphone was unveiled first at CES in January 2024 and is now available for purchase across multiple sales platforms and countries.

Designed to meet the demands of users who venture into remote and challenging environments, the Ulefone Armor 23 Ultra is pioneering high-performance converged connectivity enabled by Kigen secure OS embedded in the feature-rich smartphone with Skylo’s connectivity. It is empowering users with unprecedented connectivity in areas without Wi-Fi and cellular coverage.

The advanced two-way satellite messaging is provided by Bullitt Satellite. The smartphone incorporates a unique SOS feature to enable users to quickly contact a dedicated 24/7 international response center for emergency assistance.

“Ulefone’s pioneering Armor 23 Ultra is a perfect example of the benefits of standardization – empowering visionaries to extend connectivity experiences and services built with security at their heart. We’re proud to enable this with Kigen’s secure OS and partners.”

Vincent Korstanje, CEO of Kigen.

Ulefone Arbor Ultra23
Armor 23 Ultra

“Satellite-powered messaging has been a sought-after Armor 23 Ultra. It’s the cumulation of many unique developments across SIM, connectivity network and satellite service working in tandem that make it so innovative.”. 

Ansen Xiong, co-founder of Ulefone. 

Ulefone, Kigen and Skylo were together at MWC 2024 in Barcelona from February 26-29.

Availability: The smartphone was unveiled first at CES in January 2024 and is now available for purchase across multiple sales platforms and countries.

Additional resources: Ulefone Arbor 23 Ultra also has achieved Skylo Certification this week, which be found here.

To stay up to date with the latest news and announcements, find out more at or join our #FutureofSIM conversation on LinkedIn or X.

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