Virgin Mobile will begin selling the iPhone 5c and 5s starting October 1--the earliest the company has ever begun sales during an iPhone's product cycle.The company made its announcement on Friday, just a week after the phones went on sale at major wireless carriers, and just three months after Virgin began selling the iPhone 5. Similarly, the company didn't begin offering the iPhone 4 and 4s until June of 2012, just as the 5 was getting ready to market.Virgin Mobile's earlier arrival during this iPhone generation may signal changes to the pre-paid wireless market. In both of the previous years, the company followed Cricket in offering the phones with pre-paid plans--by just a month in 2012, but by a full nine months for the iPhone 5. So far, Cricket
