What are TCP settings and where can I find them?
TCP settings on your BlackBerry device tell the device how to connect internet-based applications to their servers. TCP settings are specific to each carrier, and typically consist of three settings: APN, Username, and Password. To find your TCP settings open the ‘Options’ application, then open the ‘TCP’ item. If you’ve got a series 7100 series device, you will need to open ‘Options’, then ‘Settings’, then ‘TCP’. TCP is pre-configured on most CDMA devices, and on Nextel devices, therefore TCP will not show up.