When a password is set in an S7-300/400 project, the password hash is stored within the project file and also written to the MMC. "Unlocking" is typically achieved via offline brute-forcing.
| Tool | Purpose |
|------|---------|
| WinHex / HxD | Manual hex editing and partition detection. |
| MMC-UTILS (Linux) | Low-level read/write to eMMC sectors. |
| Samsung Magician | For converting raw dumps to usable images (rarely used – proprietary). |
| Loke (by @Android-Helper) | Unlock extraction for S7 eMMC. |
| Unlock Tool v1.2.1 (by z3x) | Automatic PIN/password patcher. |
| 7-Zip / ext4_unpacker | Extract ext4 partitions from raw image. |
Reality: Snapdragon S7 requires RP-SWAP (Replacement Partition Swap) or using a Certified Bootloader exploit (CVE-2019-8954). You cannot directly unlock the MMC image on Snapdragon without an authorized Samsung service box. Consider using Chimera Tool or requesting a device-specific unlock service.
"Converting" is the process of reading the physical card into a file or writing a file back to a card. This is essential for creating backups of aging MMCs which have limited write cycles.
A raw MMC image is not directly openable in Step7. You must extract the object blocks (OB1, DBs, FCs, SDBs).
Using s7imgtool (Open source):
s7imgtool convert -i unlocked_image.bin -o project_dir/ -f s7p
This creates a folder containing:
Alternative – Manual extraction:
Use a hex editor (HxD/010 Editor) with the Siemens MMC template. Look for the 0x53495F41 ("SI_A") header. The blocks start at offset 0x1000.
The lock is stored in:
However, since userdata is encrypted on the S7 (if lock was enabled), you cannot directly edit it. Instead, you must disable the lock file check:
Easier route: Use a converter that supports "live patch" – it writes a modified build.prop into system.img to set ro.lockscreen.disable.default=1.
Open your mmcblk0.raw in WinHex. Navigate to sector 0:
Key partitions offsets for S7:
| Partition | Start LBA | End LBA | Filesystem |
|-----------|-----------|---------|-------------|
| BOOT | 8192 | 16384 | raw |
| RECOVERY | 16384 | 28672 | raw |
| SYSTEM | 28672 | 2293760 | ext4 |
| USERDATA | 2293760 | 58458112 | f2fs with FBE |
| EFS | 58458112 | 58480784 | ext4 |
Below are concise, practical workflows for common scenarios. Use as templates and adapt to your exact model/variant.
Verify dump with sha256sum; make a backup copy.
Unlock And Converter Mmc Image S7 May 2026
When a password is set in an S7-300/400 project, the password hash is stored within the project file and also written to the MMC. "Unlocking" is typically achieved via offline brute-forcing.
| Tool | Purpose |
|------|---------|
| WinHex / HxD | Manual hex editing and partition detection. |
| MMC-UTILS (Linux) | Low-level read/write to eMMC sectors. |
| Samsung Magician | For converting raw dumps to usable images (rarely used – proprietary). |
| Loke (by @Android-Helper) | Unlock extraction for S7 eMMC. |
| Unlock Tool v1.2.1 (by z3x) | Automatic PIN/password patcher. |
| 7-Zip / ext4_unpacker | Extract ext4 partitions from raw image. |
Reality: Snapdragon S7 requires RP-SWAP (Replacement Partition Swap) or using a Certified Bootloader exploit (CVE-2019-8954). You cannot directly unlock the MMC image on Snapdragon without an authorized Samsung service box. Consider using Chimera Tool or requesting a device-specific unlock service.
"Converting" is the process of reading the physical card into a file or writing a file back to a card. This is essential for creating backups of aging MMCs which have limited write cycles. unlock and converter mmc image s7
A raw MMC image is not directly openable in Step7. You must extract the object blocks (OB1, DBs, FCs, SDBs).
Using s7imgtool (Open source):
s7imgtool convert -i unlocked_image.bin -o project_dir/ -f s7p
This creates a folder containing:
Alternative – Manual extraction:
Use a hex editor (HxD/010 Editor) with the Siemens MMC template. Look for the 0x53495F41 ("SI_A") header. The blocks start at offset 0x1000.
The lock is stored in:
However, since userdata is encrypted on the S7 (if lock was enabled), you cannot directly edit it. Instead, you must disable the lock file check: When a password is set in an S7-300/400
Easier route: Use a converter that supports "live patch" – it writes a modified build.prop into system.img to set ro.lockscreen.disable.default=1.
Open your mmcblk0.raw in WinHex. Navigate to sector 0:
Key partitions offsets for S7:
| Partition | Start LBA | End LBA | Filesystem |
|-----------|-----------|---------|-------------|
| BOOT | 8192 | 16384 | raw |
| RECOVERY | 16384 | 28672 | raw |
| SYSTEM | 28672 | 2293760 | ext4 |
| USERDATA | 2293760 | 58458112 | f2fs with FBE |
| EFS | 58458112 | 58480784 | ext4 | "Converting" is the process of reading the physical
Below are concise, practical workflows for common scenarios. Use as templates and adapt to your exact model/variant.
Verify dump with sha256sum; make a backup copy.
