Following are some guidelines you should observe when you design an HDML application that supports images.
GUIDELINE:
Specify the <ALT> option only for images that are used as card titles or splash screens.
A device that can't display images displays the text specified by the <ALT> option instead. If this text appears in the middle of some display text without the appropriate context, it can be confusing to the user. In particular, you should avoid specifying the <ALT> option for images in choice items.
GUIDELINE: Use images to supplement, rather than replace, text.
Because many devices don't support images, you should make sure that the text is meaningful if the image can't be displayed.
GUIDELINE: Avoid using "splash screen" images larger than the device display size.
The display size depends on the device. To determine the device's display size, check the HTTP headers of requests from the device. For more information, see Retrieving subscriber, device, and UP.Link information.