> For the complete documentation index, see [llms.txt](https://docs.sandbox.com.vn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sandbox.com.vn/2.-sale/2.2-tong-dai-voice-ip/cac-truong-hop-khong-goi-duoc.md).

# Các trường hợp không gọi được

1. Fix lỗi Websocket trên Safari iOS 15

{% file src="/files/WpaHZhk7ZpUwyIXMTx0C" %}