Last Updated: August 3, 2019
Restoring your GT-I9001 Galaxy S Plus to factory settings requires the official Samsung I9001 Galaxy S Plus GT-I9001 firmware. This page provides the necessary files, drivers, and step-by-step instructions to get your device working again.
Device: Samsung I9001 Galaxy S Plus GT-I9001 | Chipset: Qualcomm MSM8255T Snapdragon S2 | Flash Tool: Odin
Android: Android 2.3.6 Gingerbread, TouchWiz UI | File Type: .tar.md5 / ZIP (Contains AP, BL, CP, CSC files for Odin)
⚠ Warning: Flashing erases all data. Back up first.
Device: Samsung I9001 Galaxy S Plus GT-I9001 (Qualcomm MSM8255T Snapdragon S2)
Flash Tool: Odin
Latest Build: the latest version
Firmware Files: 1 available
What You Need: Windows PC, USB data cable, Odin, USB drivers
Time Required: 10-20 minutes (plus 3-8 min first boot)
Samsung I9001 Galaxy S Plus GT-I9001 Firmware (Flash File) Drivers, Tools & Guide
You use Odin to flash Samsung firmware, which is a straightforward process if you follow the steps carefully. This guide includes the correct firmware file for the Samsung I9001 Galaxy S Plus GT-I9001, the proper Odin version, and the steps that work.
Before you begin, sign out of your Samsung account if you are signed in. Skipping this step will trigger the Knox Guard lock, which makes fixing the device after flashing much more difficult. Also, Samsung firmware comes in .tar.md5 format. After extracting the ZIP, you should see files named AP_*, BL_*, CP_*, and CSC_* (or HOME_CSC_*). If you do not see these files, you have the wrong package.
The Samsung I9001 Galaxy S Plus GT-I9001 was released in 2011, which means USB driver compatibility on newer Windows versions (10/11) may require manual installation rather than plug-and-play. Only one firmware build is currently available for the Samsung I9001 Galaxy S Plus GT-I9001. This is the stock ROM you should use for recovery, unbricking, or FRP bypass. Powered by a Qualcomm MSM8255T Snapdragon S2 (Qualcomm) processor, the Samsung I9001 Galaxy S Plus GT-I9001 requires Qualcomm Flash Image Loader (QFIL) and Qualcomm HS-USB drivers. Make sure to install the correct driver package before connecting your device.
This firmware was sourced directly from verified repositories and checked for integrity before being listed on this page. Samsung firmware uses a multi-file system (AP, BL, CP, CSC) specific to Odin-based flashing, which differs from single-file scatter-based tools.
Your Samsung I9001 Galaxy S Plus GT-I9001 firmware comes as a compressed ZIP file. Download and extract it using WinRAR or 7-Zip. After extracting, you should see files named like AP_*.tar.md5, BL_*.tar.md5, CP_*.tar.md5, and CSC_*.tar.md5 (or HOME_CSC_*.tar.md5). If you do not see these files, you may have the wrong firmware package for your device.
Be aware that flashing overwrites the entire software partition. Your data, apps, and accounts will all be removed. This full wipe is how the flash resolves deep software issues, anything from FRP locks and boot failures to Wi-Fi problems and app crashes.
FRP Removal for Samsung I9001 Galaxy S Plus GT-I9001
The quickest method to bypass the FRP lock on the Samsung I9001 Galaxy S Plus GT-I9001 involves using a launcher app that allows access to settings during setup. After flashing or performing a factory reset you may see a Google account lock (FRP). Our free Android apps launcher is the fastest way to get past it. This is also why I always recommend removing your Google account before flashing, it avoids this problem entirely.
Samsung I9001 Galaxy S Plus GT-I9001 Hard Reset Guide
To factory reset the Samsung I9001 Galaxy S Plus GT-I9001 without a computer, you must power off the device completely, then hold Volume Up + Power (for older models with a Home button, use Volume Up + Home + Power) at the same time until the recovery menu appears. Use the volume keys to navigate to “Wipe Data/Factory Reset” and confirm with the Power button.
A hard reset erases all data and restores Samsung I9001 Galaxy S Plus GT-I9001 to its original factory state. This fixes most software problems, slow performance, app crashes, forgotten screen locks, and bootloops. If the issue persists after a factory reset, a full firmware flash using Odin is covered in the following sections.
Which Firmware Version Does Your Samsung I9001 Galaxy S Plus GT-I9001 Need?
The most common error is flashing firmware meant for a different variant of the Samsung I9001 Galaxy S Plus GT-I9001. Before downloading anything, verify your exact device identity:
- Identify Your Exact Model Number: Go to Settings › About Phone and note your full model number (e.g. GT-I9001). The letter suffix matters, U/U1 = USA, W = Canada, N = Korea, B/F = International/Global. Flashing firmware built for a different variant can cause issues.
- Match the CSC (Region): The 3-letter region code in the firmware filename must match your device. Check Settings › About Phone › Software Information for your current CSC, or look at the Service Provider line in Download Mode. Common codes: XAA (US), BTU (UK), INS (India), SER (Russia).
- Check the Binary Level: Look at the version string in your current firmware (e.g.
XXU9BZDP, the number after the letters is the binary level). You cannot downgrade to a lower binary level. If your device is on Binary 9, only flash Binary 9 or higher firmware. - Confirm the Build Date: The last 4 characters of the PDA version encode the build date, first character is the year (A=2024, B=2025, C=2026), second is the month (A=Jan through L=Dec).
- Verify in Download Mode: Power off, hold Volume Down + Power to enter Download Mode. This screen shows your exact model, CSC, and current firmware version, use this to confirm before flashing.
Why Flash Stock ROM on Samsung I9001 Galaxy S Plus GT-I9001?
Samsung devices like the Samsung I9001 Galaxy S Plus GT-I9001 are flashed using Odin, regardless of the chipset inside. Whether you are dealing with a boot issue or a software problem, flashing the official firmware can resolve it:
- Update to the latest Android version supported by your phone.
- Clear a forgotten screen lock, PIN, or pattern without needing the original credentials.
- Resolve OTA update failures and battery drain issues.
- Resolve touchscreen responsiveness issues caused by a corrupted system build.
- Repair a phone that shuts down randomly or restarts in a loop.
- Remove persistent malware or adware that survives a factory reset.
- Recover from KG lock or Knox-related issues after an incorrect or interrupted flash on your device.
Learn more about stock ROMs and why flashing works.
Firmware Details for Samsung I9001 Galaxy S Plus GT-I9001
Here is a quick overview of the official firmware specifications:
| Firmware Information | Details |
|---|---|
| Device Model | Samsung I9001 Galaxy S Plus GT-I9001 |
| Firmware Version | N/A |
| File Size | 281.7 MB |
| Android Version | Android 2.3.6 Gingerbread, TouchWiz UI |
| Platform | Qualcomm MSM8255T Snapdragon S2 |
| Release Date | Released 2011, July |
| Region | Global, Africa and Asia |
| File Type | .tar.md5 / ZIP (Contains AP, BL, CP, CSC files for Odin) |
Which Firmware Version Should I Download?
This is the most common question I receive, so I have put together a simple guide. Find your situation in the table and go straight to the right file:
| Your Situation | What I Recommend |
|---|---|
| Phone is completely dead or stuck on logo | the latest version, download this one. It is the latest Samsung I9001 Galaxy S Plus GT-I9001 firmware available. |
| FRP / Google account lock only | See the FRP bypass guide above, you likely do not need the full firmware for this. |
| Not sure which region/CSC to download | Check Settings › About Phone › Software Information for your current CSC, or enter Download Mode (Volume Down + Power), it shows the CSC on screen. Match the 3-letter code (e.g. XAA, BTU, INS) to the firmware filename. |
| Phone slow after a recent OTA update | Try the next older version, sometimes the latest OTA introduces new bugs and an older build runs better. Make sure the binary level is the same or higher than what your device currently has. |
| IMEI missing after a previous flash | Re-flash the latest version first, then follow the IMEI repair guide. Do not skip the reflash. |
| the latest version failed with a flash error | Try the next older version instead and double-check your AP/BL/CP/CSC file assignments in Odin before assuming the firmware is the problem. |
| Restoring to factory / warranty repair | the latest version, clean state, fresh start. |
To tell which Samsung firmware is newer, look at the last 4 characters of the PDA version string (e.g. S938BXXU9CZDP). The first character is the year (A=2024, B=2025, C=2026), the second is the month (A=Jan, B=Feb… L=Dec, Z=final stable), and the last two are the revision (0-9 then A-Z, where Z is highest). But before comparing dates, always check the binary level: the digit just before the date code (e.g. XXU9CZDP = Binary 9). You cannot downgrade to a lower binary level. If your device is on Binary 9, only flash Binary 9 or higher. Also make sure the 3-letter CSC code in the firmware matches your device region.
Download Samsung I9001 Galaxy S Plus GT-I9001 Firmware
Download the official stock firmware for your Samsung I9001 Galaxy S Plus GT-I9001 below. The latest available version is the latest version. After downloading, verify the file size matches the table above, a size mismatch usually means a partial or corrupt download, and flashing a corrupt file can cause more problems than it solves.
| Software Details | Download Link | Members Link |
|---|---|---|
|
File Name: I9001BUKPH_I9001TCLKP8_TCL.zip Size: 281.7 MB | Download Link | Download Link2 |
You should only download firmware that is fully compatible with your exact device model. See the firmware selection guide above if you are not sure.
Important: The Samsung I9001 Galaxy S Plus GT-I9001 (GT-I9001) should not be confused with other I9001 Galaxy S Plus variants that may have different chipsets or regional firmware. Even devices in the same I9001 Galaxy S Plus line can use completely different processors. Always verify your exact model code “GT-I9001” in Settings > About Phone before downloading any firmware from this page.
- Open About Phone and make sure the model code reads GT-I9001. Do not rely on the name printed on the phone case.
- Verify the chipset is Qualcomm MSM8255T Snapdragon S2. You can see this in recovery mode or by checking the device specifications online.
- Use only the download links provided on this page.
- After downloading, right-click the file and check Properties to confirm the size matches the table above. If it does not, download it again.
Prerequisites for Samsung I9001 Galaxy S Plus GT-I9001 Firmware
Go through this list before you open Odin for the Samsung I9001 Galaxy S Plus GT-I9001. Two things that commonly cause problems with Samsung devices: a Samsung account that was not signed out before flashing, which can trigger KG lock, and a USB cable that works for charging but drops the connection mid-flash. Always use a proper data cable, not a charge-only cable.
- Back Up IMEI Numbers: Dial *#06# and write down both IMEI numbers now. You will need these if you need to restore your IMEI after flashing.
- Remove Google Accounts: Sign out of all Google accounts to prevent FRP lock after flashing.
- Remove Samsung Accounts: Sign out of all Samsung accounts to avoid KG lock.
- Back Up Your Data: Back up everything, photos, contacts, WhatsApp chats, important files. Flashing wipes the device completely.
- Charge Your Device: At least 50% battery. A device that powers off during a flash is very difficult to recover.
- USB Cable & PC: Use a proper data USB cable, not a charge-only cable, and a Windows computer with available USB ports.
- Install Required Drivers:
Step-by-Step: Flash Samsung I9001 Galaxy S Plus GT-I9001 Stock ROM
We are using Odin for this. A quick tip: keep “Auto Reboot” and “F. Reset Time” both checked in Odin, those two options together give you the cleanest flash result. If you are not sure which Odin version to use, check our Odin versions page. Some older Samsung devices work better with older Odin builds.
- Download and Extract:
- Download the correct firmware package from the links above.
- Extract the ZIP to a simple folder path, avoid paths with spaces or special characters, as some flash tools have trouble with them.
- Install the Listed Drivers:
- Confirm all drivers listed above are installed and that your PC has been restarted since installation. Skipping the restart is a common reason drivers do not work correctly.
- Load the Firmware File:
- In Odin, click “BL” and select the BL_*.tar.md5 file. Click “AP” and select the AP_*.tar.md5 file. Repeat for “CP” and “CSC”. Use HOME_CSC to keep data, or CSC for a clean flash.
- Connect Your Device:
- Enter Download Mode: Turn off your phone, then hold Volume Down + Power (add Home button on older models) until the warning screen appears. Press Volume Up to confirm and enter Download Mode.
- Connect your phone to your PC via USB. Odin should show “Added..” in the log area, this means your device is detected.
- Start Flashing:
- Click the “Start” button to begin.
- Do not disconnect, move the cable, or touch the device until the process is fully complete. Disconnecting mid-flash is how devices get bricked.
- Wait and Reboot:
- Once flashing finishes successfully, disconnect the device.
- Power on your device. The first boot will take longer than usual, give it up to 8 minutes.
Video Guide for Flashing
Troubleshooting Samsung I9001 Galaxy S Plus GT-I9001 Flash Errors
- Odin Shows “FAIL” Instead of “PASS”:
- This is usually a mismatch between the firmware region or model and your device. Confirm your exact model number in Settings › About Phone before selecting the firmware. Even a single letter difference in the model code matters.
- Samsung I9001 Galaxy S Plus GT-I9001 Not Recognized by Odin:
- Reinstall the Samsung USB drivers. Make sure you are in Download Mode. Try a different USB cable, Odin can be sensitive to cable quality.
- KG Lock / Knox Triggered After Flashing:
- This happens when a Samsung account was still signed in before flashing, or when unofficial firmware was used. Always sign out of Samsung accounts before flashing. If KG lock is already active, a professional unlocking tool is generally needed.
- Boot Loop After Flashing:
- Enter recovery mode (Volume Up + Power) and perform a factory reset. This clears any leftover data from the previous firmware that may be causing the conflict.
Post-Flash Behavior on Samsung I9001 Galaxy S Plus GT-I9001
Here is what is completely normal after a successful flash:
- How to know the flash was successful: Odin will show “PASS.” in green text at the top-left of the log area. If you see this, everything went fine.
- Notification sounds and ringtones will be back to factory defaults. Any custom tones you had set before will need to be re-downloaded and re-assigned in Settings.
- First boot takes 3 to 8 minutes, do not force-reboot the device. The operating system is setting itself up from scratch. Interrupting this is how devices end up in bootloops.
- Stuck in a bootloop after first boot? Enter recovery mode and do a factory reset from there, see the hard reset guide above. This can happen occasionally and does not mean the firmware is wrong.
- All your apps are gone, this is expected. Reinstall them from the Play Store. If you had a Google account backup active, it will offer to restore your apps automatically during setup.
- Wi-Fi, Bluetooth, and mobile data should all work right after setup. If mobile data is not connecting, go to Settings, SIM and Network, and re-enter your APN manually, the flash sometimes clears carrier APN settings.
- Fingerprint and face unlock data are erased during the flash. You will need to re-register your fingerprints and face data from scratch in the security settings.
Missing IMEI or Corrupt Baseband on Samsung I9001 Galaxy S Plus GT-I9001 After Flashing?
A missing IMEI on a Samsung device after flashing usually points to a corrupted EFS partition, this is the partition that stores your IMEI and carrier settings. Note that restoring an IMEI that is not your original number is illegal in most countries, so only do this if you are restoring the number the device had before you flashed. Tools like ChimeraTool or BFT can help with this. Check your local laws before proceeding.
Video Guide: How to repair IMEI
Samsung I9001 Galaxy S Plus GT-I9001 Flashing FAQ
Q1: Can I go back to an older firmware version?
A: It is technically possible on some Qualcomm builds, but downgrading can cause security issues and app compatibility problems. If the latest version is causing trouble, leave a comment below, there is usually a better fix than rolling back.
Q2: What should I do if I encounter an FRP lock after flashing?
A: Use our free Android apps launcher. FRP lock activates when a Google account was still signed in before flashing. This is why signing out of your Google account before flashing avoids this issue entirely.
Q3: My device is not detected by Odin. What should I do?
A: Start with the drivers, reinstall the Samsung USB drivers, restart your PC, then try again. Switch to a USB 2.0 port if you are on USB 3.0. Disable your antivirus temporarily. If none of that works, leave a comment with the exact error message.
Q4: Is this firmware compatible with other Samsung models?
A: No. This firmware is built specifically for the Samsung I9001 Galaxy S Plus GT-I9001 running on the Qualcomm MSM8255T Snapdragon S2 chipset. Even variants of the I9001 Galaxy S Plus with a different letter suffix can have a completely different chipset inside. Flashing the wrong firmware can leave your phone in a state that is very difficult to recover from. Always check your exact model number in Settings.
Q5: Can I flash this firmware if my phone does not turn on at all?
A: Yes, in most cases. Samsung devices can usually enter Download Mode even when the screen is completely dead, hold Volume Down + Power for 10 seconds. If the battery is completely drained, charge it for at least 15 minutes first.
Q6: Can I use a Mac or Linux computer for this?
A: Samsung firmware can be flashed using Heimdall on Linux or Mac, but the instructions on this page are written for Odin on Windows. If you only have a Mac, you may want to use a Windows virtual machine or Boot Camp for the most straightforward experience.
Q7: Do I need an internet connection during flashing?
A: No. The flashing process is entirely offline, it happens between your PC and the phone via the USB cable. You do not need internet at any point during the flash itself. You will need internet later to set up the phone and download your apps.
Q8: Will flashing erase my data?
A: Yes, flashing with Odin restores the device to factory state, including Android 2.3.6 Gingerbread, TouchWiz UI default settings. All apps, photos, contacts, and accounts will be removed. Back up everything you need before you start. There is no way to recover data once the flash is complete.
People Also Ask About Samsung I9001 Galaxy S Plus GT-I9001
Will flashing firmware on Samsung I9001 Galaxy S Plus GT-I9001 erase my data?
Yes. Flashing stock firmware on the Samsung I9001 Galaxy S Plus GT-I9001 with Odin performs a full factory reset. All apps, photos, contacts, and accounts will be removed. Back up everything important before you start. There is no way to recover data after flashing.
What is the latest firmware version for Samsung I9001 Galaxy S Plus GT-I9001?
The latest available Samsung I9001 Galaxy S Plus GT-I9001 firmware on this page is version the latest version. This page has 1 firmware build available for download. Check the firmware details table above for file sizes and Android versions.
What chipset does the Samsung I9001 Galaxy S Plus GT-I9001 use?
The Samsung I9001 Galaxy S Plus GT-I9001 is powered by the Qualcomm MSM8255T Snapdragon S2, a Qualcomm processor. Flashing requires QFIL (Qualcomm Flash Image Loader) and Qualcomm HS-USB QDLoader drivers. The device must be in EDL (Emergency Download) mode for firmware installation.
Can flashing firmware fix a bricked Samsung I9001 Galaxy S Plus GT-I9001?
Yes. If your Samsung I9001 Galaxy S Plus GT-I9001 is stuck on the logo, in a bootloop, or will not turn on, flashing the stock firmware with Odin can restore it to working condition. This is the standard repair method used by service centers for Samsung devices.
Summary
You now have everything needed to flash your Samsung I9001 Galaxy S Plus GT-I9001 back to stock using Odin. The process is straightforward as long as you follow the steps in order and do not skip the driver installation.
Got stuck somewhere? Drop a comment with the error message and the step number. I check comments regularly and will point you in the right direction.
If this worked for you, share the page so others with the same device can find it too.
Browse all Samsung firmware downloads for more devices.
Disclaimer: Flashing stock firmware is performed at your own risk. Follow the instructions on this page carefully. I cannot be held responsible for any damage to your device, but I will always try to help if something goes wrong.
