This link you provided is not about running sage on Android Operating system . From the link, the author installed debian ARM on his phone, which is sold with android OS installed, so he is using an android phone with no android OS on it , and simple calls it Android . so it is more likely that sage can run on arm processors or not. Android is different from debian, as debian is a full linux distro with full libraries. In fact installing sage on ARM processor generally is now more possible as this link points to 100MB RAM phone. while now ARM have 2GB phones and tablets with quad core processors. Sage math is now provided in dev channel for arm processors but regular linux distros. Some effort about android sage is https://groups.google.com/forum/?fromgroups=#!searchin/sage-devel/android/
Muhammad Annaqeeb (Apr 15)