By using only Samsung S390G name derived from its seris SGH-S390G, it seems this phone doesn’t have any official trademark name. That’s why this phone was designed just for TracFone Mobile Carrier. You’ll never see any other same series (similar) on the other provider-bundled device.
Anyone who already familiar with qwerty keyboard (physically) wouldn’t be get any problem on typing in this Samsung S390G. This qwerty bar device is equipped with 2.4-inch TFT display. The display doesn’t support touch input method. It has 167 ppi (pixel density) from the 320 x 240 pixels resolution on its 2.4″ display along with 262K colors.