You can use WhatsApp on an iPhone to send messages, share photos or videos, make calls, and more. Here's what you need to ...

WhatsApp users on Apple iPhone can now choose the popular messaging service as their default app, from today. It will also work for calls and there are ramifications which will apply with Siri, too.

WhatsApp has just announced new features for calls on Android, iPhone, iPad, Windows and Mac which may mean some users choose this as their default calling app and not use the built-in native calling ...