Deleted contacts remain visible but can't be notified. Contact deletion requires removing from phone's address book. Alternative option is blocking the contact
Chats and data remain intact when changing number via WhatsApp. Old number is deleted and messages from old contacts won't deliver. WhatsApp settings and profile information transfer automatically. Contacts can be notified via native option or broadcast list. Groups automatically notify when number changes
WhatsApp allows videos up to 16MB in size. WhatsApp works as a compressor but has size and format limitations. Supports MP4, AVI, MOV, MKV and 3GP video formats
Network connection problems can prevent WhatsApp from sending messages. Corrupt WhatsApp cache may cause issues. Data saver and power saver modes can interfere with WhatsApp operation. Server-side problems may affect message delivery
Archive hides WhatsApp chats from main list and keeps them in Archived folder. Archived chats are not deleted but remain hidden from main view. Feature similar to Instagram's archive functionality
Connect to stable internet and update WhatsApp. Clear phone storage if profile picture takes up space. Switch to stable version of WhatsApp