3G or 3rd generation mobile telecommunications, is a generation of standards for mobile phones and mobile telecommunication services fulfilling the International Mobile Telecommunications-2000 (IMT — 2000) specifications by the International Telecommunication Union.

Application services include wide-area wireless voice, mobile Internet access, Videotelephony, mobile TV, all in a mobile environment. To meet the IMT-2000 standards, a system is required to provide peak data rates of at least 200kbit/s.

Recent 3G releases, often denoted 3.5G and 3.75G, also provide access of several Mbit/s to smartphones and mobile modems in laptop computers.