Master unlock code S6 edge

[SMART1]

Hi
I have used my galaxy S6 edge since 2015 and it recently started giving this information on the screen whenever I turned it on. "Device is blocked. Please enter the Master unlock code."
I don't know how can I unlock it.

[SMART1]

can someone help me out?

[BibinRojan]

try hard reset ur phone

[SMART1]

I did the hard reset for like three times but still the same

[BibinRojan]

good to hear from you
try this link:Watch "how to unlock network lock pin on samsung" on YouTube
https://youtu.be/B8eqqUYZf2s