No one knows when Google's in-house-developed phone, the Nexus One, will be available on any carrier other than T-Mobile, but apparently the price may vary with the network.
The Nexus One launched earlier this year at the affordable price of $180 (with a new or renewed T-Mobile contract). It is widely considered to be the premiere Android phone because this one, unlike all the others on the market, was actually developed by Google, allowing them to tailor every centimeter of the device to its own operating system.
As such, Google wants it available to everyone, not just people who happen to be T-Mobile customers. Because AT&T runs on the same kind of service as T-Mobile (GSM), there is already a Nexus One model that works with AT&T.
For the other major carriers, Sprint and Verizon, Google is making headway. It's expected that Verizon will be the first to bring CDMA service to the Nexus One, but it may come at a higher cost.
According to Brighthand.com, a teaser for Verizon's version of the phone was on Google's Web site with a note that read "$200," but that has since been removed.
Verizon, which has a larger 3G coverage area than any other carrier, currently offers the Droid as its flagship Android-equipped smartphone.
Nexus One sales haven't been anything spectacular since it launched in January, due in large part to the fact that Google is not offering it in any brick-and-mortar location. Users can only buy it online at Google.com/phone.