https://us.community.samsung.com/t5/Galaxy-S21/S21-Ultra-Service-Delays-Purchased-in-South-Korea/m-p/2787231/highlight/true
Solved: S21 Ultra: Service Delays; Purchased in South Kore... - Samsung Community - 2787231
Jan 25, 2024 - Solved: Hello, I bought my current phone which is Galaxy S21 Ultra when I was back in Korea. The phone suddenly blacked out in last - 2787231
service delays