If your Samsung shows SIM network unlock PIN you need insert the unlocking code to use other carriers

This app supports all Samsung models from any carrier and country

Galaxy S6 S7 S8 S9 S10 S20 Edge Plus Ultra 5G
Galaxy Note 7 8 9 10 Lite
Galaxy A01 A10 A11 A10e A20 A20e A20s A30s A31 A40 A50 A50s A51 A70 A70s A71 A80
Galaxy J2 J3 J4 J5 J6 J7 J8 Plus Pure Core Shine Refine Perx Star
Galaxy Amp Prime 3 Halo Z Flip M21 M31