The AI features of Apple Intelligence have stopped working on iPhone, iPad, and Mac devices from China since the release of iOS 18.4. This functionality was added for French, German, Italian, Portuguese, Spanish, Japanese, Korean, and Chinese languages. However, Apple clarifies: "Apple Intelligence will not currently work for devices purchased in mainland China. For devices purchased outside of mainland China, Apple Intelligence will not currently function if you are located in mainland China and your Apple account's country/region is also in mainland China." The restriction cannot be removed.