As of right now, the iPhone is only available on two major wireless carriers here in the United States. AT&T, which was originally the sole carrier of the iPhone, and now Verizon both offer the device.

Rumors have been circulating over the past several months suggesting that Apple will finally extend the iPhone to both T-Mobile and Sprint this Fall, but so far there has been no official announcement.

Now, The Wall Street Journal has decided to chime in on the matter, and is reporting that a Sprint-branded iPhone is a lock for this October…

WSJ editor Dennis Berman sounded the alarm from his Twitter account a few minutes ago. Apparently, the publication has concrete evidence that Sprint will be carrying a smartphone from Apple this Fall.

“Sprint Nextel Corp. will begin selling the iPhone 5 in mid-October, people familiar with the matter said, closing a huge hole in the No. 3 U.S. carrier’s lineup and giving Apple Inc. another channel for selling its popular phone.”

According to the report, the device won’t be available to Sprint customers until mid-October. And since the iPhone 5 has been slated to launch October 7th, it sounds like Sprint might be late to the party. But better late than never I always say.

The news isn’t that surprising, given the recent reports floating around that the iPhone 5 will support both GSM and CDMA networks. Why wouldn’t Apple want a shot at Sprint’s 50 million+ subscribers?

With Sprint getting Apple’s smartphone this Fall, you have to assume T-Mobile won’t be far behind. And with the addition of two major carrier partners in the U.S., expect Apple to do big things this holiday season.

Are you currently a Sprint customer? Would you switch to Sprint if it got the iPhone 5?