T-Mobile has formally unveiled its second Android-powered handset. The myTouch 3G sports a 3.5in touch screen along with a 3.5-megapixel camera and a pre-installed 4GB microSD memory card.

Like the G1, the myTouch will use Google's Android mobile platform. The handset will also be equipped with a new preference tool called Sherpa which automatically suggests locations, sites and applications based on user interests.

The company hopes that the new handset will help it push into the consumer market by offering a device which can be more easily personalised.

"T-Mobile myTouch 3G puts you first, so you can create a mobile experience that is truly your own," said T-Mobile US chief marketing officer Denny Marie Post.

"There's no cookie-cutter approach to myTouch. Inside and out, there are boundless possibilities for personalisation so you can put your touch on the phone and make it uniquely yours."

The myTouch 3G is the latest product to be announced in what has been a busy summer for T-Mobile. Along with rolling out a major software update for the G1 handset, the company is said to be working on a number of new Android-based devices.

The news of T-Mobile's new device comes on the same day that Apple is celebrating a milestone for its latest iPhone model.

In announcing that the iPhone 3G S had sold one million units in its first three days, Apple chief executive Steve Jobs declared that "customers are voting and the iPhone is winning".