Getting started11Nano-SIM cardInsert the SIM or USIM card provided by your carrier.For dual SIM models, you can insert two SIM or USIM cards so you can have two phonenumbers or service providers for a single device. In some areas, data transfer speeds maybe slower if two SIM cards are inserted in the device than when one SIM card is inserted.Some services that require a network connection may not be available dependingon the carrier.Inserting the SIM or USIM card31 2 4Single SIM card trayDual SIM card tray

Samsung SM-A055M User Manual