The main function of the SIM-card is the storage of identification information about the account, which allows the subscriber to easily and quickly change the cellular devices (devices), without changing their account, by rearranging their SIM-card to another phone (device).
Umsebenzi oyinhloko le-SIM - ukugcina ukwaziswa ukuhlonza mayelana ne-akhawunti yakho evumela ukuthi isikhokhelo kalula futhi ngokushesha ushintshe omakhalekhukhwini, ngaphandle kokushintsha akhawunti yakho, kodwa umane kabusha-SIM khadi yakho kwenye ifoni.