Last month, after the Federal Communications Commission (FCC) over Google Voice, Apple denied that it had rejected the software. The FCC demanded answers from Google, Apple and AT&T, the exclusive U.S. mobile carrier for the iPhone when it heard reports that Apple had blocked Google Voice from the App Store, the only sanctioned marketplace for iPhone and iPod Touch applications.

Google Voice lets users decide which phone numbers are rung, and in which order, when a call is placed to a central number. The service also allows users to place inexpensive calls from mobile devices, bypassing the cellular carrier.

"Contrary to published reports, Apple has not rejected the Google Voice application, and continues to study it," to the FCC.

Today, Google asked the FCC to make public a section of its letter that had been previously redacted, explaining that several organizations had filed Freedom of Information Act requests asking to see the text that was previously omitted from the public version.

According to Google, Apple rejected Google Voice on July 7, when Google's senior vice president of engineering and research, Alan Eustace, spoke with Philip Schiller, Apple's head of marketing, in a telephone call. "It was during this call that Mr. Schiller informed Mr. Eustace that Apple was rejecting the Google Voice application," said Google's letter to the FCC.