Mobile business is the next major evolution of e-business. Today more people own a mobile phone than own Personal Computers (PCs). In three years mobile devices such as Personal Digital Assistants (PDAs) and smart phones are likely to outnumber those PCs. This paper published by Wireless Enterprise Systems (WES) believes in the most important themes of mobile business including a clear explanation of what it is and how it is being successfully used. WES hopes this will help reader identify how it could be used to help save or make money for their business.