Welcome to the BCM21892. It may sound like every other piece of Broadcom silicon we've covered, but it actually represents an important move from a company that is eager to start pecking at Qualcomm's lunch. First and foremost, this a 4G modem for flagship phones rather than any budget fare, with support for LTE-Advanced and data speeds of up to 150Mb/s. To deliver that kind of performance, carriers either need 20MHz of contiguous bandwidth -- a rarity these days -- or they need carrier aggregation technology, which allows a modem to exploit separate chunks of bandwidth simultaneously. The BCM21892 boasts
