In the latest Ubuntu 13.04, the Ubuntu team has upgraded the MTP support, so you now can connect you mobile phone with Ubuntu. But if you are looking for a more stable version of Ubuntu, I recommend that you use a LTS (Long Term Support) version. Which currently is version 12.04.
But when using 12.04, it lack the Android 4 support. But that can be fixed with following the instruction found here http://www.webupd8.org/2013/01/upgrade-to-gvfs-with-mtp-support-in.html.
