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Did you know that a phone number is mandatory for creating a LINE account? A phone number is more than just registration info; it is the most critical key for identity verification, account recovery, and transferring your data during a device upgrade.In this article, we explain the indispensable role of the phone number in LINE and the correct steps to change your number without losing your account. Whether you are switching carriers or getting a new device, use this guide to maintain your precious LINE account safely.

Losing your LINE password can be a serious issue, preventing you from logging in during a device upgrade or app reinstallation. Account recovery becomes particularly difficult if your registered email address or phone number is no longer accessible.In this article, we explain the specific procedures for resetting your password using your email address or phone number. We also introduce essential preventive measures to ensure you never lose access to your account again.

To use friend-search features such as ID Search or Phone Number Search on LINE, you must complete "Age Verification" to certify that you are 18 or older. However, many users—especially those who have recently switched devices or use a Budget SIM (MVNO)—frequently encounter errors such as "Verification failed" or being unable to access the carrier authentication screen.In this article, we categorize the specific causes of LINE age verification failures into three patterns and provide a detailed recovery guide. We also highlight specific workarounds for Budget SIM users. Let’s resolve these issues so you can use the ID search feature without a hitch.

Having your LINE account hijacked by an unauthorized third party is a serious security breach. It can lead to the spread of fraudulent messages requesting money, as well as the leak of sensitive personal information and chat history. The primary causes are "password reuse" and sophisticated "phishing scams."In this article, we explain the specific tactics used by hackers and provide a detailed "Emergency Response and Account Recovery Guide." We also outline "Definitive Preventive Measures" to ensure you never become a victim again. Let’s protect your LINE account and your friends now.

It can be a major disruption to your daily life when you try to send a LINE message and see "Failed to send" or find the "Sending" icon (the spinning circle) stuck indefinitely. The causes range from simple connection instability to issues with the recipient's account status or corrupted in-app data.In this article, we pinpoint the exact reasons why your LINE messages are not going through and provide a step-by-step recovery guide focusing on three perspectives: Connection, App, and Account. Let’s resolve these issues and ensure your messages reach their destination.

It is a high-priority emergency when the LINE app crashes immediately upon opening or freezes on the logo screen. In most cases, the reason LINE won't start is due to device-side factors: corrupted app data (cache accumulation), insufficient memory, or version mismatches between the app and the OS.This article categorizes the causes into three patterns and provides a step-by-step guide to emergency fixes—such as force-quitting and clearing cache—that you can try without losing your chat history. Let’s restore your vital communication line.

It can be a major disruption to your daily life when LINE messages arrive without a sound or the notifications themselves are significantly delayed. The root cause is often a complex mix of in-app setting errors and system-level factors such as "Battery Optimization" or "Focus Modes" on your iOS or Android device.In this article, we pinpoint why LINE notifications stop working and provide a step-by-step manual for emergency fixes. Let's restore your notification settings to ensure you never miss an important message again.

When trying to find a friend via LINE ID, you may encounter the "No results found" message or find that the ID search menu isn't available at all. The primary reasons for this are incomplete age verification, privacy settings (on either side), or temporary system restrictions.This article categorizes the reasons for ID search failures into three patterns and provides a detailed guide for checking your settings. Let’s resolve these issues to ensure you can add friends smoothly.

LINE is an indispensable communication tool in our daily lives, but many encounter "login failed" issues during device upgrades or app reinstalls. The causes range from simple password errors and changes in phone numbers to insufficient transfer settings or even account bans.This article categorizes LINE login issues into three patterns and provides detailed emergency fixes and account transfer procedures. We also introduce definitive preventive measures to ensure you never lose your contacts or chat history.

You open Instagram one day, only to be met with a message stating, "Your account has been disabled." This is an account ban (suspension). Instagram may disable accounts without prior warning if they find a violation of their Community Guidelines or Terms of Use. Without knowing the causes, anyone could be at risk of suspension.This article categorizes the specific reasons for account bans and provides a detailed "Appeal Procedure" to help you regain access. We also outline "Definitive Preventive Measures" to ensure you can use Instagram safely and never face a ban again.