How do i deactivate the fake call on a Samsung S5600?

I have 2 Samsung Phones. 1 is a Samsung B3410 and one is a Samsung S5600. They both have the stupid fake call function. On my B3410 i can deactivate it but i don't know how on the S5600. The menus are 90% the same. Please can someone tell me how to deactivate it as it's bugging me to gate fake calls.|||settings. application settings, into fake call then switch off