onn 8 Tablet
A sixty-dollar Walmart tablet the manufacturer abandoned, running LineageOS 23.2 and a live lab dashboard instead.
What it is
An onn 8-inch tablet, model t302v — MT8786V/N, eight cores, 2.9 GB of RAM, an 800 × 1280 panel. Sixty dollars twenty-seven dollars (on sale). onn shipped it, patched it to Android 15, and stopped: last security patch 2025-11-05, no further updates coming.
It now runs a LineageOS 23.2 GSI on Android 16, at patch level 2026-05-01 — six months newer than anything the manufacturer ever shipped. Google packages went from about 100 to 22, Walmart’s two to zero, and 6.2 GB of used storage down to 1.1 GB.
What runs on it
The wallpaper is 103 lines of GLSL — a scrolling perspective grid, a banded sun, hashed stars — holding 58–59 fps and costing nothing at all once the screen is off or an app is in front of it.
The panel over the sun isn’t a shortcut to telemetry. It’s a Home Assistant Template widget rendering server-side truth on the home screen: WAN throughput, host memory and disk, printer nozzle and bed temperatures, office climate, and how many of 326 sensors are currently dead.
Every fitted component works — Wi-Fi, Bluetooth, audio, touch, accelerometer, light sensor, battery. The gyroscope and magnetometer are absent because they were never soldered on. Camera enumerates two devices, not yet shot-tested.
Lawnchair handles the launcher, since Nova shut down. The one setting worth writing down is display density: at 214, the device reports 598 dp and drops out of tablet mode, which stops Launcher3’s taskbar and the system nav bar from fighting over the same strip of glass.
Why it matters
Nobody throws away a tablet because the processor wore out. They throw it away because the software stopped arriving — and the end-of-support date is a company deciding that writing more code for a sixty-dollar unit isn’t worth what it costs them.
That calculation is coming apart. Hardware is getting more expensive and lean software is getting cheap to write, so the last five percent that makes a device good — the density value, the tile set, the shader, the dashboard widget — is now an evening’s work instead of a line item nobody would fund. Old hardware isn’t waste; it’s substrate sitting behind a support date somebody else picked.
The catch, on record in the article: cheap software is not correct software. The one optimisation here that fooled me completely was written fast, measured honestly, and broke half an hour later. The scarce thing stopped being the writing and became the checking.
The full build log — the unlock, a backup archive with two partitions of zeros, and an optimisation that failed on a delay — is in sixty dollars.