Phreaks are people who enjoy learning about the phone system, especially the technical details, and unpublished details that phone companies would rather we didn't know about. They are also interested in the workings of the phone company, and trying find ways around the system, often the billing and accounting procedures.
A major part of Phreaking is attempting to obtain phone calls for free or below the rate at which the phone company would like to charge. The alt.ph.uk news group is not here to teach people how to defraud phone companies though, and most of the discussion is likely to be of purely technical interest. If you have non-technical questions then there are other groups where you may post your messages.
We will not help you change your IMEI or unlock your phone, such activities are done for nefarious purposes and we won't take the risk that you wish to take advantage of this. If you wish to change the settings of your phone, please phone your mobile provider and they should be able to provide you with all the help you need. If they don't let you change your settings then there's bound to be a reason, don't come complaining, there are forums for your complaints and alt.ph.uk is not one of them.