SIVAPRASAD

T-Mobile said Tuesday that it would unveil details of the first and much-anticipated mobile phone based on Google’s Android software on Sept. 23 at a press conference in New York.

The phone itself, which is being manufactured by HTC, is not likely to be available until next month. But top executives from Google, T-Mobile and other companies are expected to unveil details about the phone’s release date, pricing, plans and software at the press conference.

The phone is expected to become a challenger to other high-end phones like Apple’s iPhone and the BlackBerry line of devices made by Research In Motion. Other manufacturers and cellphone carriers are expected to introduce Android-based phones in the coming months.

Google is promoting Android phones as a way to ensure that its services, as well as other services that may use its advertising system, are available on a broad range of mobile phones. But Google also stands to benefit from the popularity of devices like the iPhone, whose PC-like Internet browser has greatly increased the likelihood that its owners will conduct Web searches on their phones.