Here is our story: we were searching what does lock sound do because for the past few weeks, sound stopped working in my son's games--just games, like Asphalt 8, Minecraft, etc., but not other apps--I can still play the podcasts without any problem. I checked all the Sound settings and couldn't figure out why.
When was the first touchscreen phone invented? The first touchscreen phone was launched in 1992 by IBM.The IBM Simon is also referred as the first smartphone.Simon is the first smartphone to be incorporated with the features of a PDA.
Touch screen devices generally come with either resistive or capacitive screens. The type of screen dictates how the device reads user input. In turn, this affects the type of stylus needed to navigate the device, as the stylus must be compatible with the display type. Prior to the 2007 release of the iPhone, most touch screen devices featured resistive screens.