Voice over Internet Protocol is a system for delivering digitized voice communications across IP networks. VOIP technology allows phone calls to be made between compatible handsets or on computers with appropriate software.

WAP

The Wireless Application Protocol is a set of specifications, developed by the WAP Forum, that lets developers using Wireless Markup Language build networked applications designed for handheld wireless devices. WAP was designed to work within the constraints of these devices: a limited memory and CPU size, small, monochrome screens, low bandwidth and erratic connections. WAP is a de facto standard, with support from more than 200 vendors.

WCDMA

Wideband Code Division Multiple Access is a 3G wireless technology derived from CDMA that transmits digitized data over a wide range of frequencies to boost speed. It uses wide 5 MHz channels and is associated with UMTS and GSM, where it boosts speed by substituting TDMA technology for CDMA. It's used for voice, data and video services and can achieve data rates up to 2M bit/sec.