It was announced on 27 April 2009[2] and was released on 29 June 2009 as the first Samsung Mobile device to use the Android operating system introduced in the HTC Dream (marketed as the T-Mobile G1), [3] and the first in what would become the long-running Galaxy series.

The Galaxy is a smartphone, offering quad-band GSM and announced with tri-band HSDPA (900/1700/2100) at 7.2 Mbit/s (however, Samsung's official pages for the Danish,[4] Finnish,[5] Norwegian[6] and Swedish[7] versions only mention dual-band UMTS 900/2100).

The phone features a 3.2-inch AMOLED capacitive touchscreen, a 5 megapixel autofocus camera with power LED flash, and a digital compass.

Unlike the first Android phone, the HTC Dream (known as the T-Mobile G1 in the USA), the i7500 has a standard 3.5 mm headphone jack,[8] and a Directional Pad in place of a trackball.

Due to a lack of firmware updates, Samsung received criticism from original Galaxy users.