The Samsung Galaxy S8 AU is locked to the network, sim can only use the SIM of the AU KDDI network, if you use the sim card of other networks need to unlock the S8 AU SCV36. Currently AU KDDI network does not support selling code to unlock sim, so you can not buy unlock code S8 AU SCV36.
Now, i’ll share for you “How to unlock Samsung Galaxy S8 AU (SCV36)” by easy method. What you need to do is flash the Samsung S8 Docomo (SC02J) firmware.
LOG AND SCREENSHOT: