If you plug your android phone or tablet on your Ubuntu 12.10 and nothing is happening, follow this next steps and magically your cell phone will be recognized:
The follow code is to register your device on usb dev rules of linux:
wget http://downloads.sourceforge.net/project/libmtp/libmtp/1.1.1/libmtp-1.1.1.tar.gz
tar -xvf libmtp-1.1.1.tar.gz
cd libmtp-1.1.1
./configure --prefix=/usr
make
sudo make install
sudo cp 69-libmtp.rules /etc/udev/rules.d
sudo service udev restart
wget http://downloads.sourceforge.net/project/libmtp/libmtp/1.1.1/libmtp-1.1.1.tar.gz
tar -xvf libmtp-1.1.1.tar.gz
cd libmtp-1.1.1
./configure --prefix=/usr
make
sudo make install
sudo cp 69-libmtp.rules /etc/udev/rules.d
sudo service udev restart