Chinese smartphones.
They may or may not have backdoors in them, but then China state surveillance doesn't care about you, unless you work on a missile research or something similar.
If we're open about it nothing is really secure anymore. Nothing can really provide us with security atm, i would even hesitate to trust a company like blackphone.
I side towards abstiance, use an older dumb/feature-phone thats less likely to have backdoors (downside is its less likely to have the latest security updates). Dont send revealing photos, dont carry a gps tracker with you. Remove your presence for the web, stop providing companies with all your data (facebook etc) and actually meet people face to face for your conversations.
The only argument i can think of against the above is that people want to listen to their music and audiobooks on the go. Simple solution, get a feature phone which can support that or accept that your life is now open to everyone who wants to know everything about you.
