Certainly, here's a detailed guide on troubleshooting the issue of Line app on Android not having sound:

If you are experiencing issues with the Line app on your Android device where there is no sound, whether it's for incoming messages, calls, or notifications, you can follow these steps to troubleshoot the problem:

Step 1: Check Your Phone's Sound Settings

Firstly, make sure that your phone's sound settings are properly configured. Check if your device is not in silent or do-not-disturb mode. Toggle the volume buttons to increase the sound level.
Step 2: Check Line App Settings

Open the Line app on your Android device.
Tap on the three horizontal lines (hamburger menu) at the top-left corner to access the main menu.
Go to "Settings" and then "Notifications."
Ensure that the "Notification sound" setting is turned on and that a sound is selected. Also, verify that the "In-app sound" setting is enabled.
Step 3: Check Phone's Notification Settings

Go to your phone's settings and search for "Apps" or "Applications."
Find the Line app from the list of apps and open its settings.
Check the notification settings for Line. Ensure that notifications are allowed, and the sound is enabled.
Step 4: Clear App Cache and Data

Sometimes, cache and data accumulation can cause issues. Go to your phone's settings and find "Apps" or "Applications."
Locate the Line app and tap on it 着信音.
Select "Storage" and then tap on "Clear cache" and "Clear data." This will not delete your chats but might log you out, so be prepared to log in again.
Step 5: Check Android System Sound Settings

In your phone's settings, go to "Sound" or "Sound & vibration."
Check if "Media" or "Notification" volume is set to a reasonable level. Adjust if necessary.
Step 6: Update the Line App

Ensure that you have the latest version of the Line app installed from the Google Play Store. Outdated versions might have compatibility issues.
Step 7: Check for Android System Updates

Go to your phone's settings and search for "System" or "Software update."
Check if there are any pending updates for your Android operating system. Keeping your system up to date can often resolve compatibility problems.
Step 8: Reinstall the Line App

If none of the above steps work, you might want to try uninstalling and reinstalling the Line app. This can help if there are corrupted files causing the issue.
Step 9: Contact Line Support

If the problem persists even after trying these steps, you can reach out to Line's official support. They might have specific recommendations for your situation.
By following these steps, you should be able to troubleshoot the issue of Line app not having sound on your Android device. Remember that the exact steps might vary slightly depending on your Android version and Line app version.

Author's Bio: 

I'm an IT teacher