... starts after five oclock. Not coincidentally, thats also when the Palm Centro smartphone comes alive. Not ... Centro handle all your favorite voice functions, but it also offers text, IM, e-mail, and web access--all ... -band GSM version of the Centro for AT&T also features walkie talkie-style Push to Talk (PTT) ... integrated Palm OS 5.4.9 operating system also plays nicely with Windows XP and Vista as well ...