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Mobile IM (Instant Messaging) refers to the real-time exchange of text messages, emojis, multimedia, and status updates between users via mobile devices using internet-based messaging apps. Unlike traditional SMS or MMS, Mobile IM requires a data or Wi-Fi connection and often supports enhanced features like group chats, file sharing, voice and video calls, and read receipts. Popular Mobile IM platforms include WhatsApp, Facebook Messenger, Telegram, WeChat, and Signal. It enables seamless, cost-effective communication across countries and devices, and has become a core function of modern smartphones, often replacing SMS as the primary form of mobile communication.
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