O2 Slovakia is introducing an improved eSIM service for new O2 Flat-rate customers.The new digital eSIM will be immediately activated through the O2 application with a more convenient service and completely free of charge.Customers can purchase and activate the O2 flat rate from the comfort of their homes using the O2 application.Existing customers will also have the option to exchange their plastic SIM card for an eSIM in the future.