My impression is that the 7210 browser can download a jpg image, but cannot display one as part of an <img> tag in a wml page. Is that correct? What image types can be displayed in a wml page on the 7210?
Nokia 7210 WAP browser supports WBMP and GIF (including animated) image formats. This and other detailed information about the WAP browser in Nokia phones can be found from the Nokia WAP Phones Characteristics document at Forum Nokia web site (Technologies -> Browsing/WAP -> Documents).