Opera Mini can download images and files to your mobile handset.
Select a file for download (in this case an MP3).
Opera Mini will inform you of the file size and confirm the download.
Upon confirmation, the file download starts (may look different on your phone).
Large images gain focus for download.
Or, while viewing a Web page, click on the Menu -> Tools -> Page information
Select Download images...
Choose an image from the list of available image files.
Select the Download image... option.
Pick either original size or a scaling method and get the image to your phone.
Optionally, you can zoom in any area of the image first and download the desired fragment only.