Codex fixes 8-year home internet problem in an hour, saving $2,000 in rewiring
Northern_Virginia · reddit · 2026-09-09
A Reddit user had poor upstairs internet (22/15 Mbps) for eight years and was ready to pay $2,000 to run Ethernet through his house. Codex walked him through troubleshooting instead:
- Restarting his Google mesh raised speeds to 219/106 Mbps
- Codex spotted the round coax TV outlet in his office and suggested reusing the existing in-wall coax wiring
- The idle Verizon extender he'd already bought turned out to support MoCA networking over coax
After plugging the extender into the coax, speeds hit 740–813 Mbps down and 639–661 up—using only hardware he already owned. The $300 Google mesh he bought in March is now redundant, and Codex is currently negotiating a refund with Best Buy support on his behalf.
The standout detail: Codex proactively asked about the coax outlet, showing how feeding photos of your setup to the model can turn it into a hands-on diagnostician.
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