How to Use LINE: Complete Beginner’s Guide

LINE is one of the most widely used messaging apps in Asia and beyond, offering free text chats, voice and video calls, stickers, group conversations, timelines, and a growing set of business tools. If you are new to LINE or want to move beyond basic texting, this guide walks through account setup, everyday features, privacy controls, and how LINE fits into multi-channel messaging workflows.

What Is LINE?

How to Use LINE: Complete Beginner’s Guide - What Is LINE?.

LINE started as a messaging app and has grown into a broader communication platform. It supports one-on-one chats, group chats, voice and video calls, photo and file sharing, stickers, and a social timeline. The app is available on iOS, Android, Windows, and Mac, and it syncs conversations across devices when you enable the right settings.

For developers and operations teams, LINE also offers official messaging APIs. These APIs allow businesses to send notifications, respond to customers, and automate conversations. If you are evaluating LINE for customer support or AI agent workflows, you can connect it through a unified messaging API instead of building a LINE-specific integration from scratch.

Setting Up Your LINE Account

How to Use LINE: Complete Beginner’s Guide - Setting Up Your LINE Account.

Getting started with LINE takes only a few minutes.

1. Download the app from the official app store for your device. For desktop installation guidance, see the LINE download and install guide.
2. Open LINE and tap Sign up. Enter a valid mobile number and verify it with the code sent by SMS.
3. Set your display name and profile photo. This is what friends and contacts will see.
4. Allow notifications when prompted so you do not miss messages or calls.
5. Enable chat backup if you want to restore your history later on a new device.

LINE ties your account to your phone number, but you can also register an email address in Settings to make account recovery easier.

Adding Friends and Contacts

How to Use LINE: Complete Beginner’s Guide - Adding Friends and Contacts.

You can add people on LINE in several ways:

• Search by LINE ID if the person has created a public ID.
• Scan a QR code from the Add Friends screen.
• Use the shake feature to find nearby LINE users who are also shaking their phones at the same time.
• Sync your phone contacts to see who already uses LINE.
• Share your own QR code or link so others can add you quickly.

Once someone is added, you can start a chat, create a group, or call them directly.

Sending Messages, Stickers, and Media

How to Use LINE: Complete Beginner’s Guide - Sending Messages, Stickers, and Media.

LINE chats support far more than plain text.

• Text messages work like any other messenger.
• Stickers and emoji are a core part of LINE culture. The app includes a large built-in set, and you can download additional sticker packs from the sticker shop.
• Photos, videos, and files can be attached from your device or taken directly in the app.
• Voice messages let you record and send short audio clips.
• Location sharing sends your current or chosen location to a contact.
• Keep is a built-in storage area for saving messages, photos, links, and notes for later.

Long-press any sent message to reply, copy, forward, delete, or save it to Keep.

Making Voice and Video Calls

LINE calls are free between LINE users and work over Wi-Fi or mobile data.

1. Open a chat with the person you want to call.
2. Tap the phone icon for a voice call or the camera icon for a video call.
3. During a video call, you can mute the microphone, switch cameras, or apply filters and effects.
4. Group calls are available for multiple participants, making LINE useful for family catch-ups or small team check-ins.

Call quality depends on your connection. For important calls, use a stable Wi-Fi network when possible.

Using Groups and Timelines

Groups let you chat with multiple people in one place. You can name the group, set a group photo, invite members, and use features like polls, albums, and notes. Group voice and video calls are also supported.

The LINE timeline works like a social feed. You can post text, photos, and stickers, and your friends can like and comment. Timeline visibility is separate from chat privacy, so review both settings if you want to control who sees what.

Privacy and Security Settings

LINE includes several controls worth reviewing after setup.

• Profile visibility: Choose who can see your profile photo, status message, and timeline posts.
• Add friend permissions: Decide whether people can find you by phone number or LINE ID.
• Message filtering: Block messages from people who are not your friends.
• Login alerts: Get notified when your account is accessed from a new device.
• Two-step verification: Add an extra layer of protection beyond the SMS code.
• Letter sealing: LINE’s end-to-end encryption feature for eligible chats and calls.

Open Settings > Privacy on mobile to review these options. For a broader look at how messaging apps protect data, see what secure messaging means and how to choose it.

Using LINE on Desktop and Multiple Devices

LINE supports desktop apps for Windows and Mac, plus an iPad app. You can log in on multiple devices, but the primary account remains tied to your phone number. Chat history sync depends on your backup settings, so enable automatic backup before switching devices.

The desktop app is useful for typing longer messages, sharing files from your computer, and keeping conversations visible while you work.

LINE for Business and Multi-Channel Messaging

Beyond personal use, LINE is a major channel for customer communication in markets like Japan, Taiwan, Thailand, and Indonesia. Businesses use LINE Official Accounts to send updates, answer questions, and run automated responses.

If your team manages multiple messaging channels, building a separate integration for LINE, WhatsApp, Telegram, and others quickly becomes expensive to maintain. A unified messaging API addresses this by giving you one REST API and one webhook format across channels.

UnifyPort is a unified messaging API platform that lets developers send and receive messages across Telegram, WhatsApp, LINE, X, Zalo, and TikTok through a single interface. It normalizes provider-specific differences into a consistent JSON event shape, so your application does not need to understand LINE’s specific webhook structure or SDK. The platform includes built-in rate limiting, retries with idempotency, failure isolation, and HMAC-SHA256 signature support for secure delivery.

This matters for teams building AI agents, CRM integrations, notification systems, or operations tools. Instead of writing and maintaining a LINE-specific connector plus separate connectors for every other channel, you connect once to a unified API and route messages across channels through the same code path. For context on how messaging APIs fit into broader communication infrastructure, see the CPaaS guide.

LINE vs. Other Messaging Apps

LINE competes with apps like WhatsApp, Telegram, and WeChat, but each has regional strengths and feature differences.

LINE’s strength is its deep integration with daily life in key Asian markets, including payments, news, and official accounts. If your audience is concentrated in those regions, LINE is often the primary channel you need to support.

Common LINE Problems and Fixes

I cannot verify my phone number. Make sure you entered the correct country code and that your phone can receive SMS. Some virtual numbers are not accepted.

My chat history disappeared. LINE does not automatically restore chats on a new device unless you enabled backup. Check Settings > Chats > Backup and restore.

I cannot add a friend. The person may have restricted friend requests or hidden their LINE ID. Ask them to share a QR code or link instead.

Notifications are not working. Check both LINE’s in-app notification settings and your phone’s system notification permissions.

LINE is not available in my country. Availability varies by region. Check the official LINE website for supported countries and download options.

Related reading

• CM.com Documentation: APIs, Guides & Integration Paths - A practical map of CM.com documentation: developer portal, messaging APIs, payments, webhooks, authentication, and where a unified messaging API fits.
• Lineage Meaning, Uses & How It Shapes Modern Systems - Learn what lineage means across genealogy, biology, data systems, and brand contexts. Explore real-world examples and how lineage thinking improves traceability.
• Unipile MCP: Connect AI Agents to Multi-Channel Messaging - Learn how Unipile MCP bridges AI models with LinkedIn, WhatsApp, Telegram, and email. Setup guide, Docker config, tools, and multi-channel use cases.

Sources and further reading

• How to Use Line App || Full Guide - Line App, In this video you'll learn how to use the LINE app. Whether you're new to LINE or just want to explore its features, this tutorial will help you un...
• How To Use LINE App | LINE Messaging App Tutorial for Beginners (2026) - How To Use LINE App | LINE Messaging App Tutorial for Beginners (2026)Learn how to use LINE app easily in this beginner tutorial for 2026. This video will he...
• How to Use Line App Full Tutorial [2022] - Line app, line account, how to use line app, in this line app tutorial you will be learning how to use line app on android, and iPhone . so you wanna learn h...

FAQ

Is LINE free to use?

Yes. Messaging, voice calls, and video calls between LINE users are free. You only need an internet connection. Some sticker packs and premium features cost money.

Can I use LINE without a phone number?

LINE requires a mobile number for initial registration. After setup, you can link an email address for login and recovery, but the account starts with phone verification.

Can I use LINE on my computer?

Yes. LINE offers desktop apps for Windows and Mac. You can also use LINE in a browser through the Chrome extension, though the desktop app is more reliable.

How do I recover my LINE account?

Use the email address linked to your account or contact LINE support. If you enabled chat backup, you can restore your history after logging in on a new device.

Is LINE secure?

LINE offers letter sealing for eligible chats, two-step verification, and login alerts. No messaging app is perfectly private, so review your privacy settings and avoid sharing sensitive data in unencrypted chats.

Can businesses use LINE for customer support?

Yes. LINE provides official accounts and a Messaging API for businesses. Teams managing multiple channels can also connect LINE through a unified messaging API like UnifyPort to handle LINE, WhatsApp, Telegram, and other platforms through one integration.

Conclusion

LINE is a full-featured messaging app that goes well beyond simple texting. Once you set up your account, add friends, and explore stickers, groups, calls, and privacy settings, you can use it confidently for personal communication. For businesses and developers, LINE’s official APIs open the door to automated customer messaging, and a unified messaging API removes the complexity of maintaining separate integrations across channels. Start with the basics, review your privacy settings, and expand into multi-channel workflows only when your needs require it.

For more setup details, see the LINE download and install guide. If you are comparing messaging platforms, the Telegram beginner’s guide covers a similar app with different strengths.