I have a family phone plan and we all have simple feature phones, with added minutes and texting. Is is a cheaper option to get 4 blackberrys all with data plans instead of having 4 regular phones with added features and options. What exactly comes with the data plan other than internet...(text?, minutes??). Right now the bill comes up to about $180 a month. Would it be cheaper to get 4 fully equiped blackberrys?