Like the Fountain of Youth, wireless customers always seem to be on a quest for the truly unlimited plan. Often, just when we think we’ve grasped it, it slips out of our hands like some ephemeral bit of Holy Grail hallucination when carriers yank it away. Sprint claims it has what those customers are looking for with its new unlimited talk, data and text plans, and is guaranteeing it forever. For. Ev. Er.* [More]