How much does unlimited texting cost with Cincinnati bell?

It would depend on what plan you are on. On an individual plan, umlimited text is $14.99 a month; on a family plan, it's $4.99 a month. If I'm not mistaken, you must also have a talking plan, so you would add that cost to your total. Follow the Cincinnati Bell rate plan link in the related links to know the plans and their costs.