This week saw intensive AI OS updates, with Apple updating iOS 27 and introducing Siri AI on September 15, vivo releasing OriginOS 7 with its personal assistant Lanxin XiaoV on September 16, and OPPO releasing ColorOS 17 featuring AI and proposing AI proactive services on September 17. The Doubao Phone 2 also launched, which ZTE calls an AI agent phone, while Huawei Connect 2026 unveiled the HarmonyOS Agent Framework HMAF 2.0 and Xiaomi's HyperOS 4 Beta was pushed to the first batch of 7 device models. These AI OSes are basically equipped with on-device models and cross-app Agent scheduling capabilities, unlike previous systems with small smart features like AI object removal. All releases are concentrated in the third week of September, called the "AI OS Meta Week." The systems have not yet launched with the latest new phones, so ordinary users have not experienced them. According to Zhou Wei, Vice President of vivo, the standard RAM of flagship models has reached 12G now, and the current 30B on-device MoE model basically requires 3 to 4G of RAM. The price rise of Apple iPhone 18 Pro by more than 3000 yuan is a typical phenomenon. Whether an AI phone is worth buying depends more on its actual implemented capabilities, with Doubao Phone's design philosophy unconstrained, Apple's AI OS restrained, and Android-derived AI OSes from brands like O