sentence: Smart phones can send and receive data much faster than older phones.
sentences_before: Data communication has also become faster.
sentences_after: The industry uses different standards to label the data transmission rates. 2G was introduced in 1991. 2G means '2'nd 'G'eneration'. 3G was introduced in 2002. This is comparable to a DSL or low end cable modem speed.
concept_name: smart phone
headings: Mobile phone Smartphones
categories: Telephone Messaging