Huawei Mate 90 series smartphones on display in Hai'an City, Jiangsu Province, China on October 4, 2026. Cfoto | Future Publishing | Getty ImagesBEIJING — Faced with a slowdown in the smartphone and car markets, Huawei's consumer business is choosing to focus on phones with homegrown chips.The Chinese tech giant worked overtime to release its first smartphone — the Mate 90 series — using its own "LogicFolding" chip on Oct. 1, the country's "National Day" and a public holiday, Ahead of the event,...