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by rollcat 545 days ago
Not that difficult, DIY dumbphones are mostly case, buttons, display, etc.

https://web.archive.org/web/20190827183214/http://alumni.med...
1 comments
dotancohen 545 days ago
And a proprietary blob for actually communicating with the tower.
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rollcat 544 days ago
What are the alternatives? SDR? How's that with energy usage? Regional regulations?

Not cynical, just actually interested in practical answers and trade-offs.

link