For a sandboxed baseband check out the Neo900 project.
It seems interesting. But they want an address just to create an account. At least they don't demand a mobile number ;) And the only payment options are bank wire and PayPal. I don't see that they accept Bitcoin. Also, I see no option for anonymous fulfillment.
Re:The Coder Who Encrypted Your Texts
by programmernews3 on Friday July 10, 2015 @04:00AM
(#9862782)
Response from IRC:
Thanks, programmernews3 :)
DocScrutinizer05 says on IRC that neo900 will accept cash by mail and Bitcoin. And "anonymous fulfillment" (on-site pickup, I presume) for wholesale (N>50) orders. Cool. Someone could sell them for cash at conferences, etc.
Is there much hope for strong privacy and anonymity using smartphones? Even with secure apps, there's the baseband, controlled by the cell provider. Can it be isolated?
What are the chances for open-source hardware?
What are the main pros and cons of iOS and Android?