{
  "id": "allcall/w2",
  "vendor": "AllCall",
  "model": "W2",
  "aliases": [
    "AllCall W2",
    "harmony"
  ],
  "category": "wearable",
  "status": "open-firmware",
  "identifiers": {
    "sku": [
      "W2"
    ],
    "chips": [
      "mtk6580"
    ]
  },
  "summary": "AsteroidOS replacement operating system; upstream-supported model (harmony). Upstream platform limitations: Display (partial), Tilt-to-Wake (unavailable), Always-on-Display (unavailable), Heart Rate (unavailable). Check the exact variant's support table.",
  "projects": [
    {
      "name": "AsteroidOS",
      "url": "https://asteroidos.org/watches/harmony/",
      "kind": "firmware"
    }
  ],
  "install": [
    {
      "project": "AsteroidOS",
      "method": "other",
      "guide": "https://asteroidos.org/watches/harmony/",
      "difficulty": "medium",
      "firmware_constraints": "Match the exact model number (W2) and hardware codename (harmony) in the official guide.",
      "notes": "Uses the watch-specific bootloader/recovery procedure. Installation can erase data; read the guide's prerequisites, feature limits and backup instructions first."
    }
  ],
  "provenance": {
    "sources": [
      "asteroidos"
    ]
  },
  "updated": "2026-11-01"
}