Select Menu -> Setup -> Data network
Select Menu -> New
Enter data:
/>> Profile name: TCELL MMS
/>> APN: mms
/>> Username: mms
/>> Password: mms
/>> Primary gateway IP: 212.252.169.217
/>> Port: 8080
Other values are to be left as default.
Select Save
Select Messages
Select Menu -> Service Setup -> Multimedia Message
Tap to the right of the displayed profile name.
Select Menu -> New
Enter data:
/>> Profile name: turkcell mms
/>> MMSC: http://mms.turkcell.com.tr/servlets/mms
/>> Max Sending Size: 100K
/>> Network Profile: TCELL MMS
Tap Save
Select turkcell internet
Tap Set as Default (goes back to the previous screen)
Leave selections as default
Tap Save.