Starting Saturday, many cell phone users may find their beloved handsets even more indispensable. In addition to tapping out messages to their friends and surfing the Net, people will be able to see digital broadcasts of their favorite TV shows wherever they go, on their mobiles.

The new service, called One Seg, short for "one segment," takes its name from the one frequency segment out of 13 allocated to terrestrial digital broadcasting that is reserved for mobile phones.

Users with a TV tuner-equipped cell phones, car navigation systems and portable game players will be able to watch the broadcasts free of charge.