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Young Koreans favor iPhones over Samsung Galaxy: survey
(www.koreaherald.com)
This is a most excellent place for technology news and articles.
A bit weird to see LG in the charts (given that they're out of the smartphone industry now) and yet none of the other big manufacturers (Xiaomi, Huawei, Google).
I believe LG is also a South Korean company compared to the Chinese ones you mentioned so maybe there is a little patriotic incentive for LG over there.