The alternative is most definitely not landlines/email. We can and must demand free verifiably-secure hardware and software, including for our mobile phones. There is ABSOLUTELY NO REASON why the mobile web must be a surveillance machine.
I agree 100%. Open source software + hardware + FIRMWARE must be part of any long-term solution. "Long-term" because short-term, governments won't let that happen (they will always work with/help corporations to keep circulating products with backdoors in proprietary/closed-source firmware).
I know much of the reaction to that is going to be cynicism about what is possible there, but I'm pretty sure that cynicism is one of the bigger stumbling blocks.