The theory began off as an app that could Display screen statuses inside of a phone's Contacts menu, exhibiting if an individual was at get the job done or with a contact.[26] 知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 分享媒体、文档、位置或联系人信息 打开个人对话或群组对话。 要拍摄照片或视频，请点击 。 要附加照片或视频，请长按 > 选择要分享的照片或视频。 要附加... https://apps-whatsapp.com/whatsapp-web