After all, adding an new trusted certificate is just putting a file in a directory, but you need root permissions to do so, which on locked Android phones means a jailbreak. Let’s Encrypt could ...
Similarly, Google also said it will encrypt Android devices by default. Since then, the FBI and others have complained that Apple and Google will be basically helping bad guys get away with bad ...
If you need to add encryption or digital signing to the Thunderbird email app (or other supporting apps) on Android, there's one clear and easy route to success.