Google Inc. has upgraded its Nexus One phone so it works on the same high-speed wireless network as Apple Inc.'s iPhone, putting the increasingly antagonistic rivals on an even more direct collision course in the mobile market.
The latest version of the Nexus One unveiled Tuesday could make the device a more serious challenger to the iPhone, which uses AT&T Inc.'s
3G network as its main communications channel in the United States.The Nexus One had been running on AT&T's slower networks since Google began selling the handset in early January. The switch to AT&T's faster system represents another step in Google's attempt to siphon sales from Apple's iPhone with its own version of a sleek mobile phone that relies on touch-screen technology.
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