With reports galore that Google will likely release its Android-based ‘Nexus One’ smartphone at a press conference at its Mountain View, California, headquarters on January 5, the indications thus far point to a full T-Mobile network support, including its 3G network, for the first Google mobile device.

However, a new report suggests that though Google will release the first version of its iPhone-akin touchscreen Nexus One phone with T-Mobile service, offering only a limited option – pertaining to voice and the 2.5G standard EDGE - for the AT&T customers, Google will later launch a second version of the phone which will support AT&T’s 3G service.

The report further elucidates that though Google and T-Mobile will essentially work together to offer the Nexus one, the case with AT&T will be different since that version will supposedly be sold unlocked, and will not bear any direct link the AT&T website. It will entirely be up to customers to opt for AT&T’s service for the device.

The tablet-shaped Nexus One, which will run Android OS 2.1 on a 1 GHz Snapdragon processor, features a 3.7-inch, WVGA, AM-OLED screen; 512 MB RAM; an expandable 4 GB microSD card; a trackball; Wi-Fi a/b/g/n; Bluetooth 2.1 + EDR; and stereo support.

Furthermore, the device also boasts a 5-megapixel camera with auto-focus and LED flash; accelerometer; a GPS receiver; and digital compass.