Internet Access Point
On a Symbian OS smartphone, network connections are represented by Internet Access Points (IAPs). IAPs can be created from the phone’s control panel, usually during initial setup. The information in an IAP includes the physical connection type (such as GPRS or CSD), and the speciﬁc attributes applicable to the selected connection type (such as the phone number; user’s identiﬁer and password for a dial-up server, for CSD-type connections; or APN for a GPRS connection). You assign a name to the IAP when creating it, and that name is used when establishing the connection.
For example, you can create an IAP called T-Mobile GPRS to use the APN provided by T-Mobile. Then, when you are prompted for a connection by the phone, you select T-Mobile GPRS to use the GPRS connection. Note that IAP setup varies from phone to phone, and also depends on the particular service you intend to access. In many cases the IAP creation is done automatically for you (e.g. through a service SMS message).
Usually the operators send a settings SMS that when saved creates the IAP on the device. IAP configurations depend upon your data plan. The Access point Name field and the Proxy Settings ensure this. For example there can be a data plan that allows full internet access. i.e. the phone can be used as a modem to access any site. The service provider will usually put us behind a proxy if they want to restrict usage to just wap sites.