Glossary mobile phones - tutorial 2G - the abbreviation for technology wireless telephony second generation 3G - the abbreviation for the generation of mobile digital technology with high-speed, which allows a better quality sound and new services, such as video transmissions in real time. It provides video calls, streaming, high-speed downloads and voice calls all at once. Coverage - Totality areas where a cell phone can be used in a particular network. in Public bookmarkswith -glossarymobilephonestutorial