500 / (100 - 30) = 7 months. That's a good investment, I'd say.
I'm in a quandry. I have a corporate plan from Sprint and am currently using a Palm Centro (2 yrs. now). I want to switch to a Pre or maybe a Hero, but Sprint wants me to drop my corporate plan (about $30 per month) and go with a Everything plan (about $100 per month). My corporate plan includes unlimited data and 3000 min. per month, that's hard to give up. Any suggestions from someone that's dealt w/ this same issue? I know I could buy a Pre outright and it would run (full functionality) on my current plan, but that's like $500.