The Nexus One smartphone from Google became available for use on AT&T's 3G network, but doesn't come with a subsidized version like rival T-Mobile offers.

Previously, users who purchased the device without the subsidy and contract from T-Mobile could use the phone on AT&T's network but it was only compatible with the slower EDGE data network. Now the Nexus One supports AT&T's 3G bands in the 850 MHz and 1900 MHz bands.

Meanwhile, with virtually no marketing from Google or T-Mobile, sales of the Nexus One smartphone reached 135,000 units after 74 days, according to analytics firm Flurry. The Motorola Droid and iPhone sold more than 1 million units in a similar timeframe, the firm said.

Flurry derived the figures based on applications embedded with its technology downloaded on iPhone OS and Android devices. The firm said more than 80 percent of such applications have been downloaded on all iPhone and Android device, enabling it to derive these sales figures.

Nexus One sales also appear to be on a steady decline, with the first month of sales coming in at 80,000 units and the second month coming in at 55,000. Early on, 3G connectivity issues and poor customer support were major complaints of users and admitted as a weakness by Google. The search giant has since worked to remedy the problems; it now offers live customer care and reduced the equipment recovery fee it charges for the Android HTC-made device from $350 to $150.

For more:
- see this post from Flurry
- read this Gizmodo article
- see Google's Web store

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