Currently there are around 4 billion people worldwide using mobile phones. This is forecast to rise to 5.2 billion by 2011.

Mobile phones are now a part of most peoples lives and increasingly taking over from other devices such as MP3 players, SatNavs and cameras.

Modern SmartPhones are now replacing mobile computers for many with their incredible speed and processing power. These are particularly popular with business users who can take advantage of the extra memory now available for email and documents.

As people are just as likely to have their mobile phone with them as their purse or wallet they will be used as payment devices for small transactions. Swipe your mobile (installed with the correct software) and pay for your shopping.

They can be used for bus and train fares in the same way as an Oyster card or similar payment card.

You can also interact with your environment. With GPS functions the phone knows where you are all of the time. So if you are looking at the Tower of London it will know and can automatically download interesting facts and information about places of interest. This is known as augmented reality.

Watching TV on your mobile is possible. It doesn't have to be via the internet it can be picked up from a local television mast, thus saving your inclusive minutes and data.

Banking on your mobile is now common so you can move your money around (if you have any!) whilst on the move.

You can get fit with your phone. You can download apps to tell you how far you have run and even have routes for you to run/cycle downloaded to your phone and it will guide you.

Twitter and Facebook and all of your social networking can be done by phone. In fact phones can now be used for every aspect of your life making them indispensible.