We have RUTX12 products.
In the previous test, the module used for RUTX12 was not registered with the Korean carrier, so the USIM was directly mapped to the carrier and used.
Can I make a registration request to a telecommunication company (KT) in Korea?
It is difficult for us to use only mapped USIMs.
In order to use a regular USIM, I think you need to register it with the Korean telecommunication company's computer system.