With mobile phones becoming more like computers, offering storage for documents, personal and work data, the need to keep this data safe for business mobile users is paramount.

Most phones offer a PIN code security system. This locks all of the data but leaves the phone enabled to make emergency calls. The pin code is usually 4-8 digits. In common with your bank pin code you should make it memorable, not make it easily guessable and should not write it down and keep it with the phone!

If for any reason you enter an incorrect pin code three consecutive times the phone and/or sim card will be locked and you will be unable to use the phone or access its data. To reactivate the phone you need to know the PUC code (Pin Unlock Code). This is also known as the PUK code (Pin Unlock Key).

Should you enter the pin code wrongly 10 times in succession you will permanently lock your phone and need a new sim card, for which the network will charge you.

For O2 users the PUK code can be obtained from their website. Find an O2 PUK code. For all other networks you will have to get in touch with their customer service departments by phone (not easy if you only have your mobile with you and you've just locked it!).

As well as PIN protection SmartPhone users can download software apps that offer password protected storage facilities for all of their contacts and data. There are also apps for the safe and secure back-up of mobile phone data in the event of a lost/stolen/damaged phone.

By using a cloud storage facility and keeping your data safely online, it can be retrieved easily and downloaded to your new phone in the event of any problems.