I agree so freaking much . <| sep |> My bad , modern androids use ART instead of Dalvik , so clearing the cache partition should do . Also check WiFi advanced settings you may want to chose other option than WiFi always on . Autorotate screen can add to battery drain also Display lights . <| sep |> Doesn ' t adapting mean regular play and not being thrown into the heat of things in the dying moments of a game to salvage hopeless situations ? <| sep |> A good three hour training almost always resolves all these questions and gives a good amount of understanding clears up misconceptions . Local activists have been doing cryptoparties in most cities for years . Find one . We ' re doing them basically nonstop in Portland , Seattle and the Bay . A number of folks are also writing up guides although many are incomplete as of yet . Hang on . As to Signal Signal encrypts the transmission of messages between users that both use Signal . It ' s encrypted by one user ' s phone and decrypted by the other user ' s phone . Texts with non signal users go in the clear . The difference is visible in Signal in terms of whether or not there ' s a padlock icon under each text . If your phone or that of the person you were talking to is later taken by the cops and it is not encryptedlocked then they can read all the text messages still saved on your phone . So turn on your phone OS ' s encryption , screenlock your phone , and turn it off entirely if you ' re getting pulled over or raided . Also delete old conversations . Signal provides two additional functions to secure texts that have already been sent 1 there ' s an option in a conversation with someone with signal to automatically delete texts on both of your phones after a certain period of time obviously you have to trust them not to like photograph their phone screen . 2 Signal ' s encryption uses perfect forward secrecy which means that if they get your private encryption keys months later by seizing your unlocked device they still can ' t retroactively decrypt prior conversations . So if your phone is infected with malware then that malware can compromise Signal . And phones are pretty easy to attack and infect . So don ' t treat them like the most secure things in the world . At present I believe your keyboard app does not archive your texts in signal . But again encrypt your phone with a nontrivial login and turn if off in any situation where a cop might seize it . Some other things you didn ' t mention but that should be covered Signal messages leak metadata . A good way of explaining this is that a friend of mine got charged with 72 felonies and the only evidence they had in discovery was 1 the color of their hair , 2 that they ' d sent a Signal message in the area of a bank smashing around the time of the bank smashing . This was obviously not enough evidence to get them . However note that your phone leaks when you message and where you message . But also note that the FBI was unable to decrypt the message itself . Signal requires a centralized architecture that could be shut down . Moxie wrote a post about the tradeoffs , but essentially his approach has been to run Signal through some core severs . Even though the Signal people can ' t decrypt the messages encrypted between individuals with the app on their phone , the delivery of those messages as well as the crypto handshake exchange of public keys depends on Signal ' s servers . So signal can ' t compromise the conversations , but it can cut them off . If the state raids their servers and smashes them then the Signal apps everyone downloaded becomes useless . Your Signal app gets updates from the folks who write the Signal codebase . So you have to trust the developers and the other hackers checking their public code . However the Signal devs are a bunch of anarchists with long histories and wide networks of friends you ' re probably connected to , and the code they write has been checked and enthusiastically signed off on by all the top experts .