Shortly after AT&T (T) revealed that it sold 10 million smartphones in the holiday quarter, Verizon Wireless (VZ) on Wednesday reported its own fourth quarter estimates. The nation’s largest carrier said that it activated a record 9.8 million smartphones in the quarter, driven largely by sales of Apple’s (AAPL) iPhone. The company said in a regulatory filing with the U.S. Securities and Exchange Commission that it saw a “higher mix of Apple smartphones” sold in the quarter, likely due to the release of the 4G LTE-equipped iPhone 5. Verizon Wireless CEO Dan Mead said in the filing that the company added an estimated 2.1 million retail postpaid subscribers during the quarter, however he expects the company’s EBITDA to be down year-over-year. Verizon is scheduled to report its fourth-quarter earnings on January 22nd.