---
title: "Discussion on \"How WhatsApp Works Without Internet: Offline Messaging and Sync Explained\" | Hashnode"
description: "Discussion on \"How WhatsApp Works Without Internet: Offline Messaging and Sync Explained\". You are on a flight. Airplane mode is on. You text your friend. The app doesn't crash. It shows a clock icon. Later, you land. The message sends.\nHow?\nInternet is unreliable. Tunnels, elevators, bad c"
url: "https://hashnode.com/posts/how-whatsapp-works-without-internet-offline-messaging-and-sync-explained/6a1c53a269c80d28f6504da3"
---

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# [How WhatsApp Works Without Internet: Offline Messaging and Sync Explained](https://blog.rithbanerjee.site/how-whatsapp-works-without-internet-offline-messaging-and-sync-explained?utm_source=hashnode&utm_medium=feed)

You are on a flight. Airplane mode is on. You text your friend. The app doesn't crash. It shows a clock icon. Later, you land. The message sends. How? Internet is unreliable. Tunnels, elevators, bad c

May 31 · 3 min read · blog.rithbanerjee.site  
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## Written by

[Rith Banerjee](https://hashnode.com/@rithcoderr)

@rithcoderr

  
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