The Palm Centro smartphone has been marketed by Palm, Inc. since its release on October 14, 2007 — offering the functionality of the larger Treo 755p in a smaller size.

As of August 2008, the Palm Centro was the second-ranked US smartphone based on internet traffic, responsible for 78% of the traffic on Palm devices; it fell to fourth in February 2009, responsible for 86% of Palm traffic.

The Centro is among the last devices released with the Palm OS operating system, superseded by Palm's webOS, which debuted on the Palm Pre in June, 2009.

At a weight of 119 g, and dimensions of 4.2″ (h), 2.1″ (w) and 0.7″ (d), the Centro was the smallest smart phone offered from Palm up to its introduction. It includes a 1.3-megapixel digital camera with video capture capabilities, microSD card slot (supporting up to 8GB microSD cards), touch screen navigation and a QWERTY keyboard. The phone is available with either CDMA technology supporting EVDO Rev 0 for network access, or GSM. The stock battery allows for up to 3.5 hours of continuous talk time. The phone also offers internet connection tethering to laptop or desktop computers.

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