As you might have already heard, T-Mobile is sending out invitations to an event during which it will officially unveil the first cell phone powered by Google’s mobile OS, Android.

The phone, which is build by HTC and for the moment goes under the code-name of Dream, it was described as a combination between an iPhone and a Blackberry.

According to the various reports and rumors, Android-powered HTC will have a large screen and a keyboard to ease web surfing.

However, there are no official details about the HTC Dream , but T-Mobile’s event is already surrounded by rumors and speculations as everyone is trying to predict how much it will cost or how many units it will sell.

So far, it is believed that the new phone, which is already regarded as a competitor for Apple’s iconic iPhone, will be on sale sometime in October. Apparently, T-Mobile will demo the device and its OS during the September 23 event. 

The Wall Street Journal noted that according to people familiar with the matter, the device will sell for $199. What is more surprising is that the device will showcase Google brand, which is quite unusual, because the mobile phones list the brand of manufacturer and/or the one of the carrier.  

Google hopes that T-Mobile will sell at high volumes and it will encourage other phone makers to adopt Android.

For Google, the launch of the HTC Dream, means a victory, especially since earlier this year the Mountain View-company was confronted with rumors saying that the Android-based devices will be delayed until 2009.

However, for Google, the unveiling of HTC Dream is just the first step in its long battle to conquer the mobile realm.

Of course, HTC Dream is a milestone, but let's not forget that unlike Apple, which is centered to develop a phone, Google’s goal is more ambitious.

Google aims not only to develop a phone, but a mobile OS to compete directly with Nokia’s Symbian and Microsoft’s Windows Mobile.

It seems like Google has learned from its competitor, Microsoft, and knows that a robust, cheap and stable OS for mobile phones is the key to the new era, the one of the mobile devices. In addition, it remains to be seen how the traditional phone makers will react to Google’s new toy.

Apple has proved that a traditional computer company is able to produce a real revolution, so why not assume that Google will manage to do the same. 

Based on a single device, it will be hard to judge how good Android is, but HTC Dream could offer interesting hints about where Android is heading to.