Another day, another purported iPhone 4S/5 launch window. Or two.

This time, The Wall Street Journal is claiming reliably-sourced information (don’t they all?) that Sprint Nextel will begin selling the fifth-generation iPhone in mid-October. Further hinting that Sprint’s new prize is to coincide with the Apple device’s general public availability, we’re told that

[t]op U.S. carrier Verizon Wireless and No. 2 AT&T Inc. will begin selling the phone in mid-October as well…

As we near the end of September August sans the expected iPhone announcement proper, it seems probable that the handset is indeed slated for just such an October release. Still, we at AppAdvice expect Jobs and company to unveil the model sometime in the next few weeks or so, with stock rolling out — at least in the USA — roughly a three to four weeks later.

While the new iPhone will undoubtedly be an immediate hit for Verizon and AT&T, Sprint may have the most to gain, as the beleaguered carrier boasts only half the user-base of the aforementioned wireless leaders. Realistically, the next few weeks should reveal a solid picture of Sprint’s potential future and whether or not the brand can work its way back into the industry’s big money graces.