Google phone would support Android Platform which is opensource and supported by 34 companies worldwide. Surely this is going to bring down the cost of entry into the telecom business, so then why are companies supporting it.
Well because overall market would be benefitted because of spillover and multiplier effects which are going to follow open sourcing of platform. More and more third party VAS would be launched. More the number of softwares available in the market more the Telecom Market as a whole would benefit.
Android platform is based on the opensource Linux operating system. Google acquired Android in July 2005.