This is how to do APN (Acess Point Name) Setting to KT network for your Blackberry phone.

* On the Home screen of the BlackBerry smartphone, click Options.
–Depending on the running BlackBerry smartphone, click Settings, then Options.

* Complete one of the following:
–For BlackBerry® Device Software version 4.0 or earlier, click TCP/IP.
–For BlackBerry® Device Software version 4.1 to 5.0, click Advanced Options > TCP/IP
–For BlackBerry® Device Software version 6.0 and later, click Device, then Advanced System Settings, then TCP IP

* Enter the APN, user name, and password
–Enter APN: lte.ktfwing.com
–Skip USERNAME:
–Skip PASSWORD:

* Press the Menu key and select Save.

* Reboot your phone.