How much extra does it cost to buy a new cell phone with US Cellular during contract?

My current phone is really old and I am in need of a new phone as soon as possible. I know it is cheapest to buy a new phone when it is time to renew your contract but I cannot wait until then. I want to know if instant savings, rebates, etc still apply when you purchase a new phone with US Cellular while your still under contract. Do they charge a special fee to get a new phone while under contract?

Well actually i work for us cellular so i can tell you this.....

-you become eligible for a new phone 18 months after your 24 month contract

-rebates/discounts do not apply if your not signing a new contract

-the price w/out a contract would be full retail price

-depending on the store some do have used phones at a cheaper price

-and if your close to your elig date a early upgrade may be available or an offer to buy out the rest of the current contract at a lesser price may be offered so you can get the new phone at a discounted price

-just call 611 from your cell phone...remember it never hurts to ask

Im not sure about US cellular, but with att, i got to upgrade my phone with the special pricing after a while, even though it was still under contract.