Samsung SM-A750F Combination File (Binary U5) & Odin Flashing Guide

Understanding Samsung Combination Files: SM-A750F (Galaxy A7 2018)

A Combination File for Samsung devices, such as the one for the SM-A750F (Samsung Galaxy A7 2018), is a specialized factory/service firmware. It's crucial to understand that this is NOT standard consumer firmware intended for everyday use. Instead, combination firmware boots the device into a diagnostic service mode with a simplified interface, primarily utilized by technicians and advanced users for specific tasks like:

• Bypassing Factory Reset Protection (FRP Lock).
• Repairing DRK (Device Root Key) Issues.
• Enabling ADB (Android Debug Bridge) for diagnostics or other operations when inaccessible via normal settings.
• Performing Detailed Hardware Tests.
• Resolving certain bootloader-related problems or deep software corruption.

After using a combination file to perform the required service operation, it is ABSOLUTELY ESSENTIAL to flash a full official stock firmware package back onto the SM-A750F to restore normal Android functionality for daily use. The combination operating system is not designed for end-users.

Critical: Matching Binary Version (U5 for this file)

The combination file linked here, COMBINATION_SM_A750F_A750FXXU5ATI1_RepairMyMobile.rar, is for Binary Version U5 (as indicated by "U5" in the filename: A750FXXU5ATI1).

You MUST ensure that the binary version of this combination file matches or is compatible with the binary version currently on your SM-A750F device. Flashing a combination file with a lower binary version onto a device with a higher binary version (due to Samsung's anti-rollback protection) can result in a hard brick. Check your device's binary version in Download Mode or by going to Settings > About phone > Software information > Build number (the 5th character from the right in the baseband or build number often indicates the binary level).

⚠️ Important Warnings & Prerequisites

• For Advanced Users/Technicians Only:** These files are not for beginners. Incorrect use can permanently damage your device.
• Backup Data (If Possible):** Always back up important data if your device is accessible before any flashing procedure.
• Verify Binary Version:** Double and triple-check your device's current binary version against this U5 combination file.
• Download Correct Stock Firmware:** Have the full official stock firmware for your SM-A750F model and specific region ready to flash *after* using the combination file (ensure it's also U5 or higher).
• Charge Device:** Ensure your phone has at least 50-60% battery.
• Install Samsung USB Drivers:** Your PC needs the latest Samsung USB drivers.
• Odin Flash Tool:** You will need the Samsung Odin tool.
• Windows PC & Quality USB Cable.
• Not for Daily Use:** The combination OS is minimal.

Note on Power Stability: Ensure a stable power supply for your PC and that your device is sufficiently charged before starting any flashing process.

How to Flash Samsung SM-A750F Combination File Using Odin

1. Identify Device Binary & Download Files:**
   • Accurately determine the current binary version of your SM-A750F (it should be U5 or lower for this file to be considered).
   • Download the SM-A750F Combination File (A750FXXU5ATI1 - Binary U5) provided below.
   • Download the Samsung Odin tool.
   • Ensure Samsung USB drivers are installed.
2. Extract Files:** Extract the downloaded Combination File (it will be a .tar or .tar.md5 file). Extract the Odin tool.
3. Enter Download Mode on SM-A750F (Galaxy A7 2018):**
   • Power off your Samsung SM-A750F completely.
   • To enter Download Mode: Press and hold both Volume Up + Volume Down buttons simultaneously, then connect the device to your PC using a USB cable while still holding the buttons.
   • When a warning screen appears (often blue or teal), release the volume buttons and press Volume Up once to continue into Download Mode. (The original instruction mentioning a "home button" is incorrect for the SM-A750F, which typically has no physical front home button).
4. Launch Odin:** Open the extracted Odin folder and run Odin3.exe as administrator.
5. Connect Device to PC (if not already connected for Download Mode):** Odin should show an "Added!!" message and a blue ID:COM port.
6. Load Combination File in Odin:**
   • In Odin, click the AP button.
   • Navigate to and select the extracted Combination File (e.g., COMBINATION_SM-A750F...tar.md5).
   • Leave BL, CP, and CSC slots empty.
7. Check Odin Options:**
   • Go to the "Options" tab.
   • Ensure only "Auto Reboot" and "F. Reset Time" are checked. "Re-Partition" must be UNCHECKED.
8. Start Flashing:** Click the "Start" button in Odin.
9. Monitor Process:** Wait for Odin to complete the flash. Do not disconnect.
10. PASS! Message:** Odin will display a green "PASS!" message. The device will likely reboot into the combination firmware.

Crucial Next Step: Flash Full Stock Firmware!

Once your SM-A750F boots into the combination firmware (basic service interface):

1. Perform your intended service task.
2. When done, you MUST immediately flash a full official stock firmware package for your SM-A750F model, region, and a binary version equal to or higher than U5. Use Odin, loading BL, AP, CP, and CSC (or HOME_CSC) files from the stock firmware. This restores normal Android functionality. Do not use the phone with only combination firmware.

Download Links:

Conclusion

Samsung SM-A750F (Galaxy A7 2018) combination files are specialized service firmwares for advanced tasks. Their use requires a deep understanding of Samsung firmware, particularly the critical importance of matching binary versions (U5 for this file) to avoid bricking the device. After any operation with a combination file, flashing full official stock firmware is mandatory to restore the phone to a usable state for everyday activities.