On January 5, 2011, Motorola Mobility announced that the Atrix 4G and the Droid Bionic were headed to AT&T and Verizon, respectively, with expected release dates in Q1 of 2011. The Atrix was released on February 22 as the world's first phone with both a Dual-Core Processor and 1 GB of RAM. The phone also had optional peripherals such as a Multimedia Dock and a Laptop Dock which launched a Webtop UI. On February 24, two days after the release of Atrix, the company released Motorola Xoom, the world's first Android 3.0 tablet, and followed it up shortly afterwards with an update to make it the world's first Android 3.1 tablet.