You use your system to check how your application works in mobile for different models.
First install wireless toolkit in your system
download here: http://java.sun.com/products/sjwtoolkit/download.html
Then download and install that jad and jar files of opeamini browser in wireless toolkit
The above jad and jar for sony ericsson You can download the other version from the below link http://www.operamini.com/
go to wireless toolkit and select the file>Create project from JAD/JAR
then click on run
now type your url