Check out AT&T Refurb Madness and find Free or $.01 Refurbs all month long. Each comes with 2-yr voice agreement with qualifying monthly data plan required. Right now they have Apple iPhone 3GS 8 GB (Refurb) for $0.01. Refurb madness deals ends 4/1/12.
Also check out new Samsung Galaxy S II for $9.99* (was $99.99). Valid 3.22.12 – 3.28.12 *2 yr term and new activation required. Other restrictions may apply.