Chinese AI startup StepFun, backed by Tencent, has launched the STEPX Neo phone, featuring an AI agent built directly into its operating system rather than as a separate app. Pre-orders for the device opened in China on October 13, priced at 3,999 yuan (approximately $560). Its AI agent, Amoo, has already partnered with nearly 100 companies and products, including Alipay, Tencent, Ctrip, Didi, and Meituan.