# whatsapp

- [How do I check whether WhatsApp will accept a phone number?](/explained/whatsapp/how-do-i-check-whether-whatsapp-will-accept-a-phone-number)
- [How do I choose a WhatsApp Business API provider?](/explained/whatsapp/how-do-i-choose-a-whatsapp-business-api-provider)
- [What is a WhatsApp message template?](/explained/whatsapp/what-is-a-whatsapp-message-template)
- [What is the 24-hour customer service window on WhatsApp?](/explained/whatsapp/what-is-the-24-hour-customer-service-window)
- [What is the difference between whatsapp.failed and whatsapp.rejected?](/explained/whatsapp/whatsapp-failed-vs-whatsapp-rejected)
- [Why was my WhatsApp template rejected?](/explained/whatsapp/why-was-my-whatsapp-template-rejected)