The Nexus S, an earlier model produced by Samsung, also featured a slightly curved face. It's a unique feature on a smartphone.
While Android is the number one smartphone operating system, Apple's iOS still holds mind share and new iterations of Android often appear to attempt to one-up the iPhone. Apple began selling the iPhone 4S on Friday and said it sold 4 million in the first three days, more than double the sales of the iPhone 4.
Samsung and Google initially planned to introduce the phone and new software last week during the CTIA conference in San Diego. But at the last minute they cancelled the event, saying it wasn't the right time to introduce a new phone so close to the death of Apple founder Steve Jobs, who passed away the previous week.
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