Show HN: Hacking a $20 4G wireless hotspot into a texting device
An enthusiast posted on Hacker News a guide for converting an inexpensive $20 4G mobile hotspot into a device capable of sending text messages. By opening the unit, soldering a serial connection to the modem board, and flashing custom firmware, the maker enabled AT‑command access, allowing SMS transmission without a phone. The hack demonstrates low‑cost repurposing of consumer networking hardware.