T-Mobile had more than just big updates at its CES event; it gave us opportunities to try both its newly national HD Voice service and a seemingly unknown carrier-specific NFC app, Tap Tag. The currently Android-only software is best described as a crossover between somewhat simpler existing NFC tag systems. like Samsung's Tectiles, and multi-step automation like Motorola's Smart Actions. Put a Tap Tag-equipped phone against a relevant marker and it will perform one or m
