textbee Turns Android Phones Into an Open-Source SMS Gateway for Developers

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The team behind textbee, an open-source SMS gateway, has described how the project lets developers send and receive texts through Android phones they already own. Messages are sent via a single HTTP request, travel through the phone's SIM and number, and replies are delivered to developers' servers as webhooks. The post says more than 40,000 developers have signed up and that the project is MIT licensed. The authors also outline practical challenges such as battery-saving restrictions on Android devices, the distinction between accepted and delivered messages, and a limit of roughly 10 to 15 messages per minute per phone.

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