Different input devices (e.g., a phone keypad, voice input, etc.)
Less bandwidth than traditional networks
More latency than traditional networks
Less connection stability than other network technologies
Less predictable availability
Simple user interfaces
Single-purpose devices
Hands-free, "heads-up" operation
To enable a consistent application programming model, a very wide range of
content scalability is required. In practice, a significant amount of the
current WWW content is unsuitable for use on hand-held wireless devices.
