A usability study by Jakob Nielsen shows that people using websites on their mobile phones suffer from old-time usability issues, such as slow download time, bloated pages, and difficulties using the browsers.
To improve usability of mobile web browsing, Jakob Nielsen recommends that big and rich sites provide different websites tailored to each type of mobile device on the market. Sites that need to serve mobile devices but can’t afford building many different versions should supplement the main site with a single scaled-back mobile-optimized design, recognizing that it will serve high-end phones poorly.
The study reveals that people have problems with all kinds of mobile devices. Even the iPhone isn’t perfect, though it is, as Jakob says, “the first mobile Internet device worth criticizing.”