Whenever people ask about ways to make their smartphones more private or which is the most privacy-respecting phone to get, there’s always a few people confidently asserting “all smartphones are spy tools, get a dumbphone with no apps if you want to be private”. Which is ridiculous advice for a few reasons
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Dumbphones usually run either proprietary operating systems or outdated forks of Android. They’re almost never encrypted. They rarely get security updates. They’re a lot more vulnerable than even a regular Android phone
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With dumbphones, you’re usually limited to regular phone calls or SMS/MMS messaging. These are ancient communication standards with zero built-in privacy. Your ISP can read any text message you send and view metadata logs of any phone calls you make. In lots of places (like Australia where I live) ISPs are actually required to keep logs of your messages and phone calls
With even a regular Android phone you at least have access to encrypted messaging apps like Signal or Session so your conversations aren’t fair game for anyone who wants to read them. Of course there are better options. iOS (not perfect but better than most bloatware-filled Android devices) and a pixel with GrapheneOS (probably the best imo) are much better options; but virtually anything out there is going to be better for privacy than a dumbphone
That’s kind of the point.
Sure, you can’t do much with them, but by that very fact you also won’t have nearly as much data to be spied on.
Likewise, you can do much more with a smartphone, but that comes with a much higher surface of attack, and you also have to work a lot harder to keep all the data away from spying.
SMS/MMS and the PSTN are completely compromised by multiple governments. Not saying that makes smartphones any better, just be aware.
Yes, not so difficult to spy phone calls and SMS, but it’s way less risky for privacy and security as in Smartphones, full of sensitive data on an OS and tons of apps which logs and spy on you, spreading the information not only to the ISP and govs, but also to private advertising companies and others, which is way worse. Phone lines are way less dangerous for privacy and security as the Internet, log data stored by the ISP are deleted after an max. of three month, data on the internet are forever and can’t be deleted, because they are spreeded everywhere.
At least in my case, I don’t use my Smartphone for other things as for calls, I don’t use any messenger apps nor storing sensitive data on it, desconected GPS and localisation apps. For me smartphones as such are spyware by definition, more if the include AI like they are doing currently.