On January 11, 2011, Verizon announced during a media event that it had reached an agreement with Apple and would begin selling a CDMA iPhone 4. Verizon said it would be available for pre-order on February 3, with a release set for February 10.[26][27] In February 2011, the Verizon iPhone accounted for 4.5% of all iPhone ad impressions in the U.S. on Millennial Media's mobile ad network.[28]