The HSDPA is a mobile telephony protocol also referred to as 3.5G technology. It provides an evolutionary path for UMTS networks resulting in higher data capacity. It extends WCDMA in the way that EV-DO extends CDMA2000.

CDMA2000 1xEV-DO, on the other hand, is the CDMA2000 third-generation wireless standard that enables a high-speed wireless connectivity comparable wired broadband.

WiBro, short for Wireless Broadband, is a wireless broadband internet technology being developed by the Korean telecoms company.

If you are a techie person and you already knew all the above information, here's a question for you: what would you get if you integrate all three into one PCMCIA Card? Answer: SKTelecom's "ultimate" PC card. Said PC card is already in development and will be out in the future. For now, no precise date has been given when the SKTelecom product will be made available.