Katakan fitur apa yang yang tidak bekerja dan pesan kesalahan apa yang didapat.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
WhatsApp support will want to know when you’re experiencing the issue and if it can be reproduced.  For example, you can write, “Why does my screen in WhatsApp video call keep freezing? It’s been happening every time I make a video call. How can I fix this?” and then leave your phone number in international format. Another example of an inquiry could be, “My phone keeps telling me I have WhatsApp messages when I don’t. It started about a week ago telling me there was one. This is happening every