Another day, another new smartphone (or “featurephone,” if you will) on AT&T’s network. Today, Samsung Mobile is introducing its latest finger-friendly phone to grace America’s largest GSM network, the Solstice. At first glance, the phone actually look a lot like the Samsung Instinct that did so well for Sprint last year, with a thin, polished design and a full 3″ touch screen.There’s also a virtual landscape QWERTY keyboard, TouchWiz interface, one-touch access to frequently used applications and social