AT&T Inc. said it is considering putting extra high-speed Internet connectivity in San Diego and 20 other metro areas in the United States.

The Dallas-based telecom carrier said on April 21 that it wants to discuss the matter with civic leaders.

AT&T (NYSE: T) said the new service — offered on fiber optic lines — would produce speeds of up to 1 gigabit per second. Such speeds would allow a person to download 25 songs in one second, download a television show in less than three seconds, or download a high-definition movie in less than 36 seconds.

Cities and towns “that have suitable network facilities, and show the strongest investment cases based on anticipated demand and the most receptive policies will influence these future selections and coverage maps within selected areas,” AT&T said in a statement.

The business is marketing the service under the name AT&T U-verse with GigaPower.