The answer is YES, provided you are prepared to pay for it.
Long gone are the days of the flip phones being the only handsets available on prepaid phone plans.
Today many carriers offer the iPhone as well as other smartphones
While the iPhone is available through several prepaid carriers, Virgin Mobile has some of the best prices that we could find.
Virgin Mobile: Posted prices as of 10/12/13
iPhone 4 8GB - $199.99
iPhone 4S 16GB - $399.99
iPhone 5 16 GB - $499.99
iPhone 5C 32 GB - $549.99
iPhone 5S 32 GB - $649.99