(flashed via .pit file or scatter): prodnv , nvdata , persist — contain IMEI, calibration, and Wi-Fi/BT MAC addresses. 3. Flashing Protocol: Spreadtrum’s ResearchDownload Unlike Odin (Samsung Exynos/Qualcomm), the G1207Y uses Spreadtrum’s ResearchDownload Tool or patched Odin 3.12.3+ with Spreadtrum support.
# Extract tar.md5 tar -xvf G1207Y_*.tar.md5 simg2img system.img system_raw.img mkdir system_mount sudo mount -o loop system_raw.img system_mount Repack as TWRP-flashable zip zip -r custom_rom.zip system_mount/ META-INF/ samsung 1207y flash file
| File Name | Partition | Description | |-----------|-----------|-------------| | sboot.bin | SBOOT | Secondary Bootloader; locks bootloader & verifies next stages | | uboot.bin | UBOOT | U-Boot bootloader; initializes DRAM, loads kernel | | boot.img | BOOT | Linux kernel + ramdisk (initramfs) | | recovery.img | RECOVERY | Recovery mode (stock or custom) | | system.img | SYSTEM | Android OS (ext4 sparse image, approx 800MB–1.2GB) | | cache.img | CACHE | Empty ext4 for OTA & cache logs | | userdata.img | USERDATA | Factory reset template (often empty) | | modem.bin | MODEM | Baseband firmware (GSM/WCDMA) | | dsp_bl.bin | DSP | Spreadtrum DSP firmware | | vbmeta.img (if Android 7+) | VBMETA | Verified boot metadata (not present on Android 4.4 variants) | (flashed via