In the future, as more RF functions, including or GPS, are added to the phone, the nature of the components in a SIP may vary. All the RF functions (tuner, Bluetooth, GPS) may be combined together, while the other digital functions, including demodulation, may be absorbed into the application processor To the handset designer, the type of form factor matters little; what is important is overall functionality, size, and cost. In response, some manufacturers, such as Microtune, are also making their technology available in new wafer-level chip-scale packages (WLCSPs) that meet the demands of this market, shrink footprint, and still maintain extremely high performance.