Developer Turns Old Android Phone into Low-Cost IP Geolocation Server

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A software developer repurposed a 2021 Samsung Galaxy A32 with a cracked screen as a functional IP geolocation server, replacing a $38-per-month VPS. The 38-line Python application, built with Flask and Redis, handles around 4,000 daily requests while keeping upstream API calls under 1,000 per day through one-hour caching. The setup runs entirely inside Termux, a Linux-like environment for Android, requiring no rooting or custom firmware. The motivation was practical: the developer needed IP intelligence to combat fraud on a small SaaS product, but commercial geolocation services cost more than the app earned. Despite known limitations of using phones as servers — such as background app killing and thermal throttling — the stateless, read-only workload proved tolerant enough to make the experiment viable.

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