The past 12 months have seen a lot of action in the mobile market.

Google Android and its biggest device partner, Samsung, had a very good year as they surged ahead of Apple and the iPhone. Meanwhile other players in the mobile market, such as Microsoft, Nokia, and Research In Motion, still struggled to make a dent against Google and Apple. And the impending "spectrum crunch" has driven a bevvy of wheeling and dealing on the carrier side.

What will 2013 bring? I suspect Android will continue to get stronger. But we'll finally see whether a true "third challenger" emerges. When it comes to the carriers, there will be more consolidation as operators do all they can to gobble up as much spectrum as they can to feed the insatiable appetites of mobile subscribers.

"Android has been one of the primary growth engines of the smartphone market since it was launched in 2008," IDC Mobile Phones Research Manager Ramon Llamas said in a statement. "In every year since then, Android has effectively outpaced the market and taken market share from the competition."

Android's biggest market is China, where roughly 786 million Android smartphones are expected to be sold by the end of the year, according to market research firm Informa. This is a 45 percent jump in Android sales compared with 2011.

There's no question Android wins in the worldwide market. But the race is a bit tighter in the U.S. And it could get even closer if Apple reports big numbers in the fourth quarter for the iPhone 5. Apple's been growing its share in the U.S. In the third quarter of 2012, iOS accounted for 38 percent of smartphone sales, compared with 21.5 percent of sales last year. Meanwhile, Android lost share, getting 57.5 percent of the market in the third quarter of 2012 compared to 66 percent the year before, according to a report from Kantar Worldpanel ComTech.

Softbank wants to take control of the company and give the beleaguered carrier the financial wherewithal to make a real play against bigger rivals AT&T and Verizon Wireless. The all-cash deal is expected to close in the middle of 2013 and will give the Japanese technology and investment firm a 70 percent stake in Sprint. Softbank execs say they plan to invest at least $8 billion in Sprint, and they are determined to improve the carrier's network and make Sprint's 4G LTE network a force to be reckoned with in the U.S.

Sprint took another step this month to help secure its future with a deal to buy out remaining shares from Clearwire. The deal, which is valued at $2.2 billion, will give Sprint full control over Clearwire's spectrum as well as the company's 4G WiMax network and its upcoming LTE network.

In the early summer it struck a deal with Verizon Wireless to get even more wireless spectrum, which it intends to use to build its 4G LTE network.

But the most significant step T-Mobile took to make itself a stronger competitor was in October, when the company announced plans to to buy prepaid regional carrier MetroPCS.

While T-Mobile will still be the fourth largest wireless operator in the U.S. after the merger is finalized, the newly merged company will significantly expand its customer base and give it an even stronger position in the growing prepaid market. Combined, the new T-Mobile will boast a customer base of about 43 million, compared to Sprint's 56 million customers.

The deal is expected to close in the middle of 2013.

But about this time last year, then co-CEO, Mike Lazaridis said the new devices would be ready by mid-2012. Well, the summer of 2012 came and went with no BlackBerry 10 devices to be found. Now as 2013 approaches, the company, which has since had an executive shake-up, says that 2013 is the year of BlackBerry 10.

Meanwhile, sales of BlackBerry devices continues to fall and RIM's market share plummets. Loyal fans are crossing their fingers for a turnaround. RIM has already sent out media invitations for its BlackBerry 10 launch on January 30. We'll see if the adage "better late than never" applies to this situation.

When the device finally hit store shelves in early April, AT&T, the exclusive carrier for the device, said that the launch of the Lumia would be a"notch above anything we've ever done," including the iPhone's launch.

Indeed big marketing dollars were spent on the splashy debut. Unfortunately, sales of the device were modest. And by July, the price of the Lumia 900 had been slashed in half. With a new price tag of $49.99, AT&T and Nokia hoped to lure more customers to the device. But an update to the phone's operating system and the hope of the new Windows Phone 8 software launching a few months later, hurt sales of the Lumia 900.

In early November, Microsoft launched the newest version of the Windows Phone operating system: Windows Phone 8. The new software came just days after Microsoft launched its Windows 8 software for desktops, laptops, and tablets. The new mobile software is expected to one day tie together with the Windows 8 software.

With strong products from HTC, Nokia, and Samsung, Microsoft may finally have a chance at becoming a third strong player in the smartphone market.

But the company still faces stiff competition from Google Android and Apple iOS devices. Meanwhile, Research In Motion's BlackBerry is expected to finally launch new devices using its BlackBerry 10 OS in 2013.

These so-called incentive auctions will bring new wireless spectrum to the market, giving mobile carriers more capacity to handle growing demand for wireless data services. The spectrum will come from TV broadcasters, which will be able to give up wireless spectrum they aren't currently using in exchange for a cut of the proceeds from the auctions. The government hopes to free up at least 120MHz of spectrum for the auction.

The FCC began working on the details of the auction right away, and it presented its plan for the auctions in September. The agency is now receiving public comment on the proposal and hopes to hold the auction in June 2014.

In August, Verizon Wireless won approval from the FCC and the Department of Justice to buy a significant swath of spectrum from cable operators Comcast, Time Warner Cable, and Bright House Communications. Verizon voluntarily agreed to divest some of its wireless spectrum holdings. The carrier struck a deal with T-Mobile USA. The move proved to be a smart negotiating tactic that helped satisfy many of the FCC's concerns.

Verizon plans to use the additional spectrum tocontinue building out its 4G LTE network. The additional 20MHz of spectrum is expected to help the carrier beef up capacity in densely populated urban areas.

To get the top spot, Samsung unseated Nokia, which held the title for some 14 years. Samsung has risen through the ranks quickly, leading the market with its Google Android S series of devices. In addition to the Galaxy S III smartphone launched in 2012, Samsung also introduced two new "phablets," the Galaxy Note and the Galaxy Note 2.

Verizon, which was the first major carrier to launch its LTE network in 2010, still dominates the market in 2012 with the largest footprint. But 2012 was the year that other carriers made their mark in 4G as well.

AT&T has doubled its reach. And Sprint, which first bet on 4G WiMax for its next-generation wireless technology, also started deploying its 4G LTE network. Even smaller, regional players got into the act in 2012 as U.S. Cellular deployed its first 4G LTE radios in March. Outside the United States, LTE expanded beyond its original home in Sweden and Norway with more carrier launches in Canada, Europe, Africa, Asia, and Australia.

Fueling the growth of new LTE network deployments were a bevy of new LTE-enabled handsets, including Apple's first LTE devices. In the spring, Apple introduced the first 4G LTE Apple iPad. And in the fall it released the 4G-ready iPhone 5, iPad Mini, and fourth-generation iPad.