ByteDance's Doubao Is Becoming an AI OS — European Mobile Founders Must Act Now ByteDance is moving Doubao from a chatbot into a system-level AI layer embedded across multiple Chinese smartphone OEMs. Two of China's top five phone makers are already in talks. European mobile founders and OS developers have a narrowing window before this model arrives in Western markets through hardware partners. ## What happened in China ByteDance is not building an AI assistant. It is building an AI operating layer — and the second-generation Doubao AI smartphone, expected to launch in the second quarter of 2026, is the clearest signal yet of that ambition. The first-generation Doubao phone, built in partnership with ZTE's Nubia brand, ran into a predictable problem: major apps refused to open their permissions to a system-level AI agent that could read, interpret, and act across their surfaces. The device worked, but it was…