Last Updated: June 21, 2026
If you need to fix software issues on your phone, the resources you need are right here. You can get the official stock ROM, the necessary tools, and a guide to restore your device to its original state. I have also included steps for troubleshooting and IMEI repair.
Device: Samsung Galaxy S4 CDMA SCH-I545 | Chipset: Qualcomm Snapdragon 600 (APQ8064T) | Flash Tool: Odin
Android: Android 4.2.2 (Jelly Bean), upgradable to 5.0.1 (Lollipop), 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 Galaxy S4 CDMA SCH-I545 (Qualcomm Snapdragon 600 (APQ8064T))
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 Galaxy S4 CDMA SCH-I545 Firmware (Flash File) Drivers, Tools & Guide
Flashing Samsung firmware with Odin is straightforward once you know what to look out for. I have put everything together on this page: the right firmware file for the Samsung Galaxy S4 CDMA SCH-I545, the correct Odin version, and the steps that work.
One thing to do before you start: if your device has a Samsung account signed in, sign it out before doing anything else. Knox will trigger if this step is skipped, and dealing with a KG lock after flashing takes extra time. 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, you have the wrong package.
Powered by a Qualcomm Snapdragon 600 (APQ8064T) (Qualcomm) processor, the Samsung Galaxy S4 CDMA SCH-I545 requires Qualcomm Flash Image Loader (QFIL) and Qualcomm HS-USB drivers. Make sure to install the correct driver package before connecting your device. The stock firmware ships with Android 4.2.2 (Jelly Bean), upgradable to 5.0.1 (Lollipop), TouchWiz UI, which determines the default apps, security features, and interface you will see after flashing. The Samsung Galaxy S4 CDMA SCH-I545 was originally released in 2013, which means USB driver compatibility on newer Windows versions (10/11) may require manual installation rather than plug-and-play.
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 Galaxy S4 CDMA SCH-I545 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.
Flashing replaces your current software completely and wipes all personal data. This is by design, it is what clears out FRP locks, bootloops, pattern locks, app crashes, and other software-level problems that a regular reset cannot fix.
FRP Removal for Samsung Galaxy S4 CDMA SCH-I545
The fastest way to bypass FRP on Samsung Galaxy S4 CDMA SCH-I545 is to use a free Android apps launcher that lets you access settings during the setup wizard. 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.
Factory Reset Samsung Galaxy S4 CDMA SCH-I545 Without a PC
To factory reset Samsung Galaxy S4 CDMA SCH-I545 without a computer, 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 Galaxy S4 CDMA SCH-I545 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.
Verify Your Samsung Galaxy S4 CDMA SCH-I545 Model Before Downloading
The single biggest mistake people make is flashing firmware meant for a different variant. 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. SCH-I545). 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 Galaxy S4 CDMA SCH-I545?
Samsung devices like the Samsung Galaxy S4 CDMA SCH-I545 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:
- Clear a forgotten screen lock, PIN, or pattern without needing the original credentials.
- Resolve OTA update failures and battery drain issues.
- Recover your device when it only boots into recovery mode.
- Remove persistent malware or adware that survives a factory reset.
- Fix startup loops, lagging, and freezing on your device.
- Restore the original Samsung stock ROM to keep your warranty valid.
- 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 Galaxy S4 CDMA SCH-I545
Here is a quick overview of the official firmware specifications:
| Firmware Information | Details |
|---|---|
| Device Model | Samsung Galaxy S4 CDMA SCH-I545 |
| Firmware Version | N/A |
| File Size | 1.42 GB |
| Android Version | Android 4.2.2 (Jelly Bean), upgradable to 5.0.1 (Lollipop), TouchWiz UI |
| Platform | Qualcomm Snapdragon 600 (APQ8064T) |
| Release Date | Released 2013, May |
| 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 question I get asked most often in the comments, so I 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 Galaxy S4 CDMA SCH-I545 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 Galaxy S4 CDMA SCH-I545 Firmware
Download the official stock firmware for your Samsung Galaxy S4 CDMA SCH-I545 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: I545VRUEMK2_I545VZWEMK2_VZW.zip Size: 1.42 GB | Download Link | Download Link2 |
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 Galaxy S4 CDMA SCH-I545 (SCH-I545) should not be confused with other Galaxy S4 CDMA variants that may have different chipsets or regional firmware. Even devices in the same Galaxy S4 CDMA line can use completely different processors. Always verify your exact model code “SCH-I545” in Settings > About Phone before downloading any firmware from this page.
- Your model number is a variant of SCH-I545 with a different letter suffix. Check About Phone carefully, one letter difference can cause a failed or broken flash.
- Your chipset differs from Qualcomm Snapdragon 600 (APQ8064T). Confirm in recovery mode before proceeding.
- You downloaded the file from a source other than this page.
- The file size differs significantly from the sizes listed in the table above, a size mismatch usually means a partial download, which will fail mid-flash.
Before You Start: Samsung Galaxy S4 CDMA SCH-I545 Requirements
Go through this list before you open Odin for the Samsung Galaxy S4 CDMA SCH-I545. 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 Galaxy S4 CDMA SCH-I545 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.
- Prepare the Flash Files:
- Go to the download section and grab the firmware package that matches your device.
- Unzip the file to a folder on your desktop. Avoid using folder names with non-English characters or spaces, the flash tool may not read them correctly.
- Confirm Driver Setup:
- The drivers listed in prerequisites need to be installed and working before you connect the phone. If you are not sure, reinstall them and restart your computer.
- 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 “Start” to kick off the firmware write.
- Hands off the phone and cable until the tool shows completion. Moving or disconnecting the device mid-flash is the most common cause of a bricked phone.
- Wait and Reboot:
- When you see the success message, disconnect the USB cable.
- Hold the power button to boot the phone. Give it a solid 5 to 8 minutes for the first startup, this is normal.
Video Guide for Flashing
Common Issues When Flashing Samsung Galaxy S4 CDMA SCH-I545
- 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 Galaxy S4 CDMA SCH-I545 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.
Normal Behavior After Installing Samsung Galaxy S4 CDMA SCH-I545 Firmware
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.
- 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.
- Storage will show almost full capacity available since all your apps and files are gone. The system partition size varies by firmware version but is typically 4 to 8 GB on most devices.
- Battery percentage may seem inaccurate for the first day. The battery statistics are calibrated during normal use. Charge the phone fully once without interruption and the readings will stabilize.
- 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.
- The phone will feel warm during first boot, this is normal. It settles after a few minutes once the initial app setup is complete.
- 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.
Missing IMEI or Corrupt Baseband on Samsung Galaxy S4 CDMA SCH-I545 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 Galaxy S4 CDMA SCH-I545 Flashing FAQ
Q1: Is this firmware compatible with other Samsung models?
A: No. This firmware is built specifically for the Samsung Galaxy S4 CDMA SCH-I545 running on the Qualcomm Snapdragon 600 (APQ8064T) chipset. Even variants of the Galaxy S4 CDMA 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.
Q2: Will flashing erase my data?
A: Yes, flashing with Odin restores the device to factory state, including Android 4.2.2 (Jelly Bean), upgradable to 5.0.1 (Lollipop), 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.
Q3: How long does the flashing process take?
A: The actual flash usually takes between 3 and 10 minutes depending on the firmware size and USB connection speed. The first boot after flashing takes another 3 to 8 minutes. Do not interrupt the device during either stage. If the progress bar in Odin appears stuck, give it a few more minutes before assuming something went wrong.
Q4: My IMEI shows “unknown” after flashing. Is my phone permanently damaged?
A: No, it looks alarming, but it is fixable. Follow the IMEI repair guide in the troubleshooting section above. For Samsung devices, check for EFS partition corruption first. Do not insert a SIM card until the IMEI is restored.
Q5: 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.
Q6: How do I enter recovery mode?
A: Power the device off completely, then hold Volume Up + Power at the same time until the recovery menu appears. For older Samsung models with a physical Home button, use Volume Up + Home + Power. The recovery menu displays the build number which you can use to verify your firmware version before flashing.
Q7: Will flashing void my warranty?
A: Flashing official stock firmware generally does not void your warranty since you are restoring the device to its factory-intended state. However, some manufacturers may flag that the bootloader was unlocked or that the flash counter increased. Check your specific warranty terms with Samsung support if you are concerned.
Q8: 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.
People Also Ask About Samsung Galaxy S4 CDMA SCH-I545
Will flashing firmware on Samsung Galaxy S4 CDMA SCH-I545 erase my data?
Yes. Flashing stock firmware on the Samsung Galaxy S4 CDMA SCH-I545 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.
Can flashing firmware fix a bricked Samsung Galaxy S4 CDMA SCH-I545?
Yes. If your Samsung Galaxy S4 CDMA SCH-I545 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.
What is the latest firmware version for Samsung Galaxy S4 CDMA SCH-I545?
The latest available Samsung Galaxy S4 CDMA SCH-I545 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 Galaxy S4 CDMA SCH-I545 use?
The Samsung Galaxy S4 CDMA SCH-I545 is powered by the Qualcomm Snapdragon 600 (APQ8064T), 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.
Samsung Galaxy S4 CDMA SCH-I545 Firmware, Final Notes
That covers the entire flashing process for the Samsung Galaxy S4 CDMA SCH-I545. With the latest version installed, your device should boot cleanly and be ready for setup.
If you ran into an issue that is not covered here, or if one of the steps did not work the way it should, let me know in the comments. Include the error code or screenshot if you have one.
Bookmark this page if you work on Samsung devices regularly. I keep it updated when new firmware versions come out.
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.
