> For the complete documentation index, see [llms.txt](https://docs.ochats.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ochats.io/faq.md).

# FAQ

- [Why I cannot send out WhatsApp messages?](https://docs.ochats.io/faq/why-i-cannot-send-out-whatsapp-messages.md): Send an approved WhatsApp template message first if WhatsApp has locked your conversation.
- [Why I cannot receive incoming message from user?](https://docs.ochats.io/faq/why-i-cannot-receive-incoming-message-from-user.md): Contacts must click your opt-in link before messaging can begin.
- [Why I cannot search for my LINE ID?](https://docs.ochats.io/faq/why-i-cannot-search-for-my-line-id.md): Fix LINE ID search issues and learn how to set up a custom LINE Premium ID.
- [Can WeChat Official Accounts Join Groups?](https://docs.ochats.io/faq/can-i-use-wechat-official-account-to-join-wechat-group.md): WeChat Official Accounts cannot join WeChat Groups directly.
- [What Does the Double-Tick Icon Mean?](https://docs.ochats.io/faq/if-i-saw-double-tick-in-message-module-does-it-mean-that-my-contact-has-received-and-read-my-message.md): What the double-tick delivery icon means across each channel.