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A worksheet photo is much less useful when the tutor's explanation of what to correct has disappeared. If you deleted the LINE lesson chat on your Google Pixel 9, you may need both the marked-up image and the follow-up messages before you can finish the assignment.
Dr.Fone - Data Recovery (Android) offers a focused way to look for that combination without a chat backup. You can scan an eligible Pixel 9, inspect the available conversation and attachment results, and choose the useful material to save to your PC. This guide shows how to recover deleted LINE messages on Google Pixel 9 while keeping the feedback, worksheet versions and recovered files distinct.
In this article
Before you start
Check the Pixel 9 configuration before connecting
The confirmed Google Pixel 9 entry specifies Android 14 and kernels 6.1.75 / 6.1.157. Match your phone's current Android and kernel information to that entry; the Pixel 9 Pro is a separate model. This article uses Windows-only Advanced Recovery and saves results to a PC, not back into LINE.
Preserve the lesson data still on the phone
Keep LINE installed, avoid clearing its storage or cache, and postpone a reset or firmware change. Prepare a Windows PC, a USB data cable and a destination folder. Follow the product's connection and access prompts; do not unlock the bootloader, flash firmware or improvise Root instructions for recovery.
Understand what a no-backup scan replaces
LINE's official help says deleted chats cannot be restored through LINE without an earlier successful backup. Standard Backup covers text messages and must predate the deletion; Premium Backup does not roll back a manually deleted chat. Dr.Fone instead examines available local app data. Results depend on what remains discoverable, and an expired attachment is not a guaranteed original file.
Check whether the lesson chat is hidden rather than deleted
The tutor or study group has vanished from the chat list, but you are not sure which action you selected.
Step 1 Open LINE's actual hidden-chat list
On the Pixel 9, open LINE and go to Home > Settings > Chats > Hidden chats. If the relevant chat is listed, tap Edit next to it, then Unhide chat.
Step 2 Check the feedback itself, not just the chat name
Open the unhidden conversation and look for the specific explanation and worksheet. If those messages are present, you have redisplayed retained history. If the chat was deleted, this menu is not an undo command; use the app-data scan below for the missing local records.
- Unhiding requires no backup, but it does not recover genuine deletions.
- Deleting a whole LINE chat affects devices using the same account, so a linked PC should not be treated as a complete surviving lesson backup.
Match recovered lesson feedback to the right worksheet
| What you need | What to inspect | How to use the result |
|---|---|---|
| The tutor's correction | Available LINE conversation text | Read the explanation and surrounding available messages to identify the question being discussed. |
| The annotated worksheet photo | LINE Attachments | Check the visible question number and markings rather than assuming every worksheet image is the final version. |
| A replacement document or demonstration video | The matching available attachment | Open the saved file on the PC and compare its content with the correction; a filename alone cannot establish the latest revision. |
| An image without its explanation | Attachment results with incomplete message context | Keep the useful image and ask the tutor to clarify the missing instruction instead of inventing the feedback. |
Common problems and fixes
Several similar worksheet images appear in the results
Compare the question numbers, annotations and actual page content in the previews. Select the plausible versions you need and check the saved copies on the PC. Do not rely on a filename or preview position to decide which correction came last.
The lesson text is available but its illustration is missing
Open LINE Attachments as well as LINE. If the illustration is not found, save the useful explanation and ask the tutor for the matching image. Message text and a downloadable attachment can survive independently.
How to use Dr.Fone - Data Recovery (Android)
Dr.Fone - Data Recovery (Android) helps you look beyond a missing chat-list entry and examine available LINE app data on a supported Google Pixel 9. Its Windows-only Advanced Recovery workflow provides separate conversation and LINE Attachments views, so you can look for the explanation alongside the worksheet, photo, video or document it refers to. Previewing and selecting results lets you keep the relevant study material on your PC without relying on a backup.
- Recover the useful context: review available lesson messages instead of searching only for worksheet images.
- Compare the supporting material: inspect LINE Attachments independently for the photos, videos and files found by scanning.
- Keep a focused study copy: save the selected messages and attachments to a computer folder for review.
Scan Android phones and tablets directly.- Preview and recover only what you want.
- Supports WhatsApp, photos, videos, contacts, and more.
- Works with 6000+ Android devices.
Follow the official Advanced Recovery workflow
Step 1 Choose Advanced Recovery and connect your Pixel 9
Launch Dr.Fone on Windows and open Toolbox > Data Recovery. Select Android > Recover Android Data, choose Advanced Recovery and click Start Scan. Connect the Pixel 9 by USB when prompted and follow the on-screen instructions until the phone is detected.
Step 2 Select LINE as the app to scan
Choose LINE from the available app-data categories, then click Start Scan. Use the LINE selection for this lesson-history task; WhatsApp and WhatsApp Business have separate scan-selection requirements and are not the target here.
Step 3 Let the selected app-data scan finish
Keep the Pixel 9 connected while Advanced Recovery scans. If you must interrupt the scan, click Cancel before removing the cable. If the phone is temporarily unresponsive after scanning or recovery, restart it as instructed on the screen.
Step 4 Review LINE feedback and LINE Attachments separately
Choose LINE in the results sidebar to inspect the available conversations. Use search or filters where offered to find the lesson discussion. Then open LINE Attachments and inspect the available worksheet photos, videos and documents. Select the message and file results you need.
Step 5 Recover the selected lesson material to your PC
Click Recover and follow the prompts to choose a folder on your computer. Save the selected results, then open the output to check the feedback and supporting files. This workflow creates a PC copy rather than reinserting the lesson into LINE on your phone.
Conclusion
For missing lesson explanations and worksheet files, Dr.Fone - Data Recovery (Android) gives you a practical combination of LINE app-data scanning, separate attachment previews and selective PC saving. Download Dr.Fone for Windows, connect your supported Google Pixel 9 and start looking for the feedback and study material you need.
FAQ
1. Can I recover LINE messages without a backup on Google Pixel 9?
Dr.Fone - Data Recovery (Android) can scan the supported Pixel 9 configuration for available local LINE records without using a backup. Select LINE in Windows Advanced Recovery, preview the results and save your chosen items to a PC. This is separate from LINE's official backup restoration.2. Does this Pixel 9 guide cover Android 15 or the Pixel 9 Pro?
The supplied base Pixel 9 entry specifies Android 14 with kernels 6.1.75 / 6.1.157. Do not transfer a Pixel 9 Pro entry or a different Android version to this model. If your configuration differs, have its eligibility checked before proceeding rather than changing the firmware.3. Can I recover deleted LINE photos on Google Pixel 9 without the entire lesson chat?
Inspect LINE Attachments for the photos the scan finds. An available image may be useful even if the surrounding messages are incomplete. Check the preview and saved file to see whether it contains the readable markings you need.4. Will unhiding the tutor's chat bring back deleted feedback?
Unhide chat reveals history that was retained when a chat was hidden. It does not undo deletion. Confirm that the actual lesson messages are present rather than treating a reappearing chat name as recovered history.5. Can I put the recovered feedback directly back into LINE?
This Advanced Recovery workflow saves selected records and attachments to your Windows PC. It does not rebuild the original LINE conversation on the Pixel 9.
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