In the amped-up Android rollout, T-Mobile and Acer both confirmed they will be introducing smartphones based on Google's open-source mobile platform.

T-Mobile is planning to offer the follow-up device to the T-Mobile G1 early this summer, but declined to offer any more details, while Acer announced a time-frame for its Android devices for Q3.

Acer this week joined the Open Handset Alliance and said it will launch smartphones based on the open source Android platform by the end of 2009.

The computer manufacturer will also launch Acer Aspire One netbooks based on the Android platform, with the netbooks hitting the market in advance of the smartphones.

"Netbooks are designed to be compact in size and easy to connect to the Internet wherever you go," said Jim Wong, Acer's president of IT Products Global Operation, in a statement. "The Android operating system offers incredibly fast wireless connection to the Internet. For this reason, Acer has decided to develop Android netbooks for added convenience to our customers."

Up to 20 Android smartphones will be on the market worldwide this year as the battle for mobile market share becomes more fierce. In addition to Google's (NASDAQ: GOOG) Android, a key software update from Apple (NASDAQ: AAPL) for its iPhone is coming soon, while Palm's highly touted Pre, sporting the new webOS, goes on sale Saturday.

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