Google 2011, "The Globe and Mail" reported that Google bid $900 million for 6000 Nortel Networks patents. On August 15, 2011, Google made its largest-ever acquisition to date when it announced that it would acquire Motorola Mobility for $12.5 billion subject to approval from regulators in the United States and Europe. In a post on Google's blog, Google Chief Executive and co-founder Larry Page revealed that the acquisition was a strategic move to strengthen Google's patent portfolio. The company's Android operating system has come under fire in an industry-wide patent battle, as Apple and Microsoft have sued Android device makers such
Google Voice received after the Gizmo5 acquisition. In 2011, the Gizmo5 site closed service to its registered members. As of January 2012, the website is no longer available. On June 22, 2010 Google Voice dropped the requirement for invitations to become a subscriber, and the service became available to anyone in the USA with a Google account. On July 27, 2009, Apple Inc. rejected a Google Voice app that had been submitted by Google six weeks earlier. Other apps created for use with Google Voice, such as GVdialer, GV Mobile and VoiceCentral, were removed from the App Store. Apple states that the