Rather, what I have done :<p>Buy an android phone. A good one. Whichever you like.<p>Install F-droid from website.<p>Install Termux from F-droid.<p>You get a full Debian linux running inside your phone as an app. No need to even root your phone.<p>You can now :<p>Access, parse your address book, sms, call records everything from command line.<p>Access sensors on your phone from command line -- like GPS, compass or camera.<p>Access SD card and other files. rsync, scp, wget and others.<p>SSH into your server.<p>Edit some Java files, compile and install it as an app from your phone.<p>Install other packages that you need using apt-get or pkg. Like python, ruby, php, gcc.<p>And many more.