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prompter
I want to install a custom Android OS on my phone because I think my current operating system is not privacy friendly. What are some custom Android operating systems that care about my privacy?
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099e322f-4e24-4ede-8a65-d830a7746f22
assistant
Two popular options are:

CalyxOS
CalyxOS includes a whole host of features right out of the gate, including the ability to communicate through encrypted protocols, anonymized web browsing, and automatic security updates. The ROM ships with DuckDuckGo’s browser and search engine, ensuring that your online activity remains anonymous.
Your personal data can also be backed up at any time, with strong encryption to boot. While you can install microG if you’d like, the entire operating system is usable without Google services.
Finally, CalyxOS includes support for Android Verified Boot, a part of the Android OS that ensures all executed code on the device comes from trusted sources.

GrapheneOS
This heavy emphasis on privacy and security is taken one step further with GrapheneOS, which has far more development work put into it.
It not only includes everything that CalyxOS does, but also adds features such as a hardened browser and kernel. What this means is that almost every aspect of the operating system is optimized to keep out attackers.
For instance, if you install GrapheneOS on a Google Pixel device, the system is capable of completely disabling cellular radio transmission on a hardware level. This means that your device cannot communicate with the outside world when you toggle airplane mode.
This is an important feature if you’re in a foreign country, for example, and you’d like to keep your location hidden from local carriers.