NXP's first acquisition as an independent company was in 2007, when NXP announced that it would acquire Silicon Laboratories’ AeroFONE single-chip phone and power amplifier product lines to strengthen its Mobile and Personal business. Fourteen months later, NXP announced that it would transform its Mobile and Personal business unit into a joint venture with STMicroelectronics, which in 2009 became ST-Ericsson, a 50/50 joint venture of Ericsson Mobile Platforms and STMicroelectronics, after ST purchased NXP's 20% stake. Similarly, in April 2008, NXP announced it would acquire the set-top box business of Conexant to complement its existing Home business unit. In October 2009, NXP announced that it would sell its Home business unit to Trident Microsystems.