What's the signal of South Korea's Samsung fold3 telecom card?

South Korea's Samsung fold3 telecom card signal is not good. According to relevant public information, there is no dual card dual standby on the Korean version of fold3 hardware, which is unfriendly to telecom cards. At the same time, the support for the 5G networks of the three major domestic operators is extremely poor, and there is no charger in the package. By default, 404 power-consuming household buckets are installed on the software, and there are no analog door cards and bus cards. Samsungpay supports UnionPay, fingerprint payment, localized negative screen, total recall, yellow calendar, holiday calendar, Samsung Life Assistant, bixby vision and other functions are limited. Although brushing the Bank of China system can solve some system software differences, brushing the Bank of China will definitely destroy BL, so it is useless to simulate the door card and traffic card. Ota is not as fast as the original system, Samsung's health and safety folder is directly scrapped, and some bank software cannot be opened. At present, the camera can't be used directly after unlocking BL, not to mention that Rom such as Aurora has not been adapted to fold3.