The highest cellular chip growth rate last year was the multimode stand-alone (3G/LTE) baseband chip market at 892% for a total of $852 million, reports Forward Concepts.
That represented 50 million modems and another 20 million 3G/LTE digital basebands integrated with application processors (DBB Apps Processors) brought the 3G/LTE basebands to 70 million total units.
Source:
http://www.electronicsweekly.com/Articles/2013/04/11/55917/multimode-baseband-shipments-soar.htm