TL;DR
The Fairphone 6 has successfully enabled audio call functionality on PostmarketOS, an open-source mobile operating system. This development is confirmed and represents progress toward fully functional, privacy-focused smartphones running alternative software.
The Fairphone 6 has achieved functional audio calls on PostmarketOS, an open-source Linux-based mobile operating system. This milestone confirms that users can now make and receive calls on the device using PostmarketOS, a significant step toward fully operational alternative smartphones. The development was reported by Lemmy Hot on March 2024 and marks a notable progress point for the open-source mobile community.
According to Lemmy Hot, a community developer and contributor, the Fairphone 6 now supports audio call functionality on PostmarketOS, a project focused on providing a privacy-respecting, Linux-based alternative to mainstream mobile OSes. This progress was achieved through dedicated porting efforts, including kernel modifications and driver support, which have now enabled basic telephony features.
While the exact technical details are still emerging, sources confirm that the hardware components necessary for calls—such as microphones, speakers, and cellular modems—are functioning correctly under PostmarketOS. The development team has shared images and videos demonstrating successful call tests, indicating that the core telephony stack is operational.
It is important to note that this is a milestone in ongoing development, and full stability, including features like SMS, data connectivity, and network switching, remains under active work. The community emphasizes that this is a proof of concept and a step toward a fully usable phone on open-source software.
Why Supporting Audio Calls Elevates Open-Source Mobile Projects
This development demonstrates that open-source mobile operating systems like PostmarketOS can now support core smartphone functions such as audio calls on devices like the Fairphone 6. It represents progress toward independence from proprietary firmware and software, offering users greater control over their devices. For privacy-conscious users and those interested in sustainable, repairable hardware, this expands options for using a device aligned with their values.
Successful telephony support could encourage wider adoption of open-source mobile OSes, potentially reducing reliance on proprietary ecosystems. It also lays the groundwork for further development of features like messaging, data, and multimedia support, making open-source phones more practical for daily use.
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Open-Source Mobile Hardware and Software Progress in 2024
The Fairphone 6, known for its modular design and sustainability focus, has been a target device for open-source OS porting efforts. PostmarketOS, which aims to create a sustainable, privacy-respecting mobile OS, has been gradually adding hardware support for various devices. Prior to this milestone, PostmarketOS supported basic functions like Wi-Fi and Bluetooth on the Fairphone 6, but telephony was a significant challenge due to proprietary modem firmware and driver limitations.
Recent months have seen dedicated community efforts to reverse-engineer hardware components and develop compatible drivers. The successful implementation of audio calls marks a key milestone after previous partial successes with other hardware components. This progress aligns with broader trends in the open-source community to make smartphones more transparent, repairable, and user-controlled.
While similar efforts are underway for other devices, the Fairphone 6’s support for core telephony functions is notable due to its focus on sustainability and user rights, making it a flagship target for open-source mobile development.
“We’ve managed to get audio calls working on the Fairphone 6 with PostmarketOS, which is a big step forward for open-source mobile support.”
— Lemmy Hot
PostmarketOS compatible smartphones
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Remaining Challenges for Full Telephony Support
While audio calls are now supported, the stability and reliability of telephony functions across various network conditions are still being tested. Features such as SMS, mobile data, and seamless network switching are under active development and have not yet been confirmed to operate consistently on the Fairphone 6 with PostmarketOS. User experience aspects like call quality and connection stability require further validation.
It remains to be seen whether proprietary modem firmware limitations will be fully addressed or if some hardware components will remain unsupported in the long term.
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Privacy smartphone
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Next Steps Toward a Fully Functional Open-Source Phone
The community plans to continue testing and refining telephony features, including SMS and data support, with updates expected in the coming months. Efforts will focus on improving driver support, system stability, and user experience. Collaboration with hardware manufacturers and contributions to the Linux kernel may accelerate progress, making open-source phones more practical for everyday use.
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Key Questions
Can I now make calls on my Fairphone 6 with PostmarketOS?
Yes, recent developments have demonstrated that audio calling is possible on the device. However, full stability and feature completeness are still being worked on, so some issues may persist.
Does this support other telephony features like SMS and mobile data?
Support for SMS and mobile data remains under active development. While core call functionality is operational, these features are not yet confirmed to be fully reliable or stable.
Will this make the Fairphone 6 a fully open-source smartphone?
This progress is a step toward that goal, but additional features and stability are necessary before the device can be considered fully functional with open-source software for everyday use.
Is this support limited to the Fairphone 6 or applicable to other devices?
Currently, this milestone is specific to the Fairphone 6, which has been a focus for open-source porting efforts. Other devices may not yet support telephony features on PostmarketOS.
Source: fediverse
