Reuters on a report by SK media Chosun Ilbo

  • U.S. officials have been lobbying South Korea not to use Huawei Technologies products,
  • In one incident, a U.S. State Department official told a South Korean counterpart that local telco LG Uplus Corp, which uses Huawei's equipment, should "not be allowed to serve in sensitive areas in South Korea"

China is South Korea's biggest market for exports. Which would make such a move problematic.