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 integration with Google Hangouts. Google provides free PC-to-PC voice calling worldwide. As described above, Google Voice users in many countries may make low-cost calls to international phone numbers, and may also make free PC-to-phone calls within the United States and Canada. Vincent Paquet, a co-founder of GrandCentral who became a senior product manager at Google, said in 2009 that he expected Google Voice domestic service to remain free because the cost of operation is so low and, "We can generate enough revenue from international calling to support the service." Several years after this prediction, the service remains free of charge.