Opera Software has released the improved Opera Mini 5.1 for Windows Mobile. The new update offers accelerometer support, better support for high resolution handsets, and the ability to set Opera Mini as the default browser.

Opera Mini 5.1 has already been released for Java, Android and BlackBerry phones. Now available for Windows Mobile 2003 SE, 5.x and 6.x handsets, Opera Mini’s server backbone speeds up browsing while reducing the data transferred to the phone. For users roaming on expensive networks, or with pay-as-you-go data plans, says Opera, the browser can cut the mobile data bill by up to 90 per cent.

“Opera Mini 5.1 contains several key improvements for the millions of people with a Windows Mobile phone,” says Opera co-founder, Jon von Tetzchner. “The new Opera Mini is particularly vibrant, and really takes advantage of high resolution screens. And, now that you can set Opera Mini as your default browser on a Windows Mobile phone, it is much easier to enjoy the speed boost and data compression.”

To download Opera Mini 5.1, point your phone’s browser at m.opera.com and Opera will automatically select the optimized version for your phone. Opera Mini is free to download and use. Opera Mini works on Windows Mobile 2003 SE, Windows Mobile 5.x and Windows Mobile 6.x phones.