Open your mobile phone's native browser and go to http://m.opera.com to download the version for your device.
Expect the following changes
Faster ... panning and zooming
No checkerboard, ever
Text stays sharp during zooming
Improved text-wrap on zoom
Buttons for jumping to the top/bottom of the page
Haptic feedback (if supported in hardware)
Share URL on social networks, email etc
Improved Geolocation support
- from Gizmodo
Opera Mobile is for smartphones while Opera Mini browser is for slower java enabled phones.