The phrase "handset business" refers to the industry that manufactures and sells mobile phones or smartphones. It includes the design, production, marketing, and distribution of these handheld devices. Full definition
Sales of its smartphones peaked a few years back and since then the company has been losing money in the mobile handset business. (indianexpress.com)
His goal right now is to stabilize the money - losing handset business, and he said on the call that he would be happy to just break - even on hardware. (canadianbusiness.com)
Previously Vice President of Handset Business at Huawei, Bruce Lee, confirmed the chipset would be included in the Mate 10, and if that's the case we can safely assume it'll also be in the Huawei P11 as well. (techradar.com)