I have an older plan for an iPhone 4S. Call display is included in my plan as part of the iPhone Value Pack + Vvmail option. Just checked the settings on my phone, which is on iOS 8.1.2, and there are no options to control call display.
Does your plan include the iPhone Value Pack or something similar?
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Reigning heavyweight world champion Deontay "The Bronze Bomber'' Wilder takes on his most dangerous challenger as he defends his WBC title in a rematch against once-beaten Cuban slugger Luis "King Kong'' Ortiz.