Opera announced today that Opera Mini 5.1 is now available for Android devices. The company claims this is the most popular browser for mobile phones, and places an emphasis on its speed.

"Opera Mini is a favorite not just on feature phones, but also on smartphones, scoring an impressive 1 million downloads on the iPhone during the first 24 hours of availability," Opera says. "Opera Mini is highly optimized for almost any handset, delivering the best Internet experience on more than 3000 mobile phone models."

"Opera Mini 5.1 for the Android platform is the next step in bringing the world’s most popular mobile web browser to all major platforms, offering improved performance and great web experience to almost any handset," says Opera CEO Lars Boilesen. "Opera Mini is used by over 61 million people on more than 3000 handset models and with today’s release Opera continues its mission to provide the best web experience on any device and on any platform."

The browser can be set as the default browser on your phone, and the company says on Android phones with bigger screens, it offers improved page layout.

Opera Mini 5.1 for Android can be downloaded via the Android Market or at m.opera.com.