Starting with Android 4.0 Ice Cream Sandwich, the OS does not support Mass Storage Device interface for USB data transfer. It use
MTP for phone storage access via USB . It cause some difficulty in Ubuntu 12.04/12.10 for browsing and copying via USB. You can mount the SD card and phone storage, but its only display the first level folder. You can't browse the any file inside it because 12.04 and 12.04 shipped without MTP sppport
Upgrade Gvfs for MTP support
1. Add the the langdalepl/gvfs-mtp' PPA to your sytem.
sudo add-apt-repository ppa:langdalepl/gvfs-mtp
sudo apt-get update
2. Lanuch update manger and install all updates from LP-PPA-langdalepl-gvfs-mtp or use 'apt-get upgrade'
3. Restart your system and connect your device. You can mount the SD card and browse the files using ubuntu file browser.
