You can install Linux in a chroot, it's not perfect but it should work in every phone. Otherwise if you have a Nexus phone/tablet, you can install MultiROM (ht

You can install Linux in a chroot, it's not perfect but it should work in every phone. Otherwise if you have a Nexus phone/tablet, you can install MultiROM (http://forum.xda-developers.com/showthread.php?t=2011403 http://forum.xda-developers.com/showthread.php?t=2011403) and have both Android and something else installed.