It's a setting on mobile phones that the phone's carrier uses to set up a connection to the gateway between the carrier's network and the internet.
Ọ bụ ọnọdụ na ekwentị mkpanaaka na ọkwọ ụgbọ ala ahụ na-eji ịtọọ njikọ na ọnụ ụzọ ámá n'etiti netwọk ụgbọelu na ịntanetị.