A low-carbon computing platform from your retired phones

Original Article ↗ Hacker News Discussion ↗

Overall Reception

  • Many are excited about reusing old smartphones as cluster nodes, likening it to Raspberry Pi or PS3 clusters and home lab projects.
  • Others see it mainly as an interesting research/demo rather than something likely to become commercially mainstream.

Locked Bootloaders & Firmware Blobs

  • A major theme: retired phones are often e‑waste because of locked bootloaders, proprietary blobs, and short OEM support.
  • Even if the OS is replaced, low‑level firmware (baseband, Wi‑Fi, Bluetooth) often remains unpatchable, especially pre‑Treble devices, raising long‑term security concerns.
  • Some argue these blobs don’t matter for a pure compute node if radios are disabled and only USB/ethernet is used; others insist outdated firmware still poses risk in production settings.

Security & Networking Concerns

  • Several posters argue old phones should not be on internet‑exposed networks due to unpatched vulnerabilities.
  • Counterpoint: for trusted, non‑exposed workloads (e.g., local compute/NAS) risk may be acceptable if there is no kernel‑level RCE.
  • How data and power are plumbed (USB‑C, internal buses, carrier boards) is noted as unclear.

Practicality & Economics

  • Questions about cost: disassembly, testing, custom racking, and ongoing heterogeneity may outweigh benefits versus buying conventional servers.
  • Some think it could work if paired with higher‑value services (e.g., gaming, LLM harnesses) or as a hedge against future hardware shortages.
  • Concerns about storage endurance (eMMC/flash wear) and battery issues (“spicy pillows”) are raised; others report very long lifetimes in practice.

Environmental Impact

  • Debate over whether this is a real carbon win.
  • One view: embodied emissions in manufacturing dominate; extending device life is highly beneficial, possibly needing ~25‑year lifetimes to beat frequent replacement.
  • Another view: the key question is whether retrofitting existing phones has lower carbon cost than manufacturing new datacenter‑class hardware; thread deems this unresolved.

Regulation, Openness & Prior Art

  • Strong support for regulations forcing unlockable bootloaders and eventual source release (e.g., after 7–20 years).
  • Frustration that mobile platforms, especially non‑Pixel Android and iOS, remain locked down despite such reuse potential.
  • Multiple references to existing efforts: PostmarketOS, Termux servers, prior “junkyard computing” and phone‑cluster research, decentralized compute networks, and laptop‑motherboard clusters.