In Shanghai, China, Li Wei uses his Digma Plane 7574S 4G tablet for mobile gaming and streaming. After a corrupted OTA update, his SC9832-based device entered a perpetual boot loop and the camera stopped working. This detective-style guide compiles insights from Chinese forums (MIUI, CNX) and XDA to restore functionality with the official SC9832 V20171221 Android 7.0 firmware.
Case File: Error Symptoms
- Boot Loop: Displays “Digma” logo 5 seconds, then restarts
- Camera Failure: “Camera Failed” error in apps
- Forum Reports: MIUI and CNX threads attribute this to corrupted
vendor.imgpartition - XDA Tip: Use SPD Tool R27.24 with SC9832 scatter to avoid “BROM ERROR: S_BROM_CMD_STARTCMD_FAIL”
⚠️ Critical Warning
Flashing nvram.img or vendor.img incorrectly can erase IMEI and disable camera hardware. Always back up these partitions first.
Firmware Package Details
| Filename | Digma_Plane_7574S_4G_SC9832_20171221_7.0_SPD.zip |
|---|---|
| Size | 942 MB |
| Build Date | 2017-12-21 |
| Android Version | 7.0 Nougat |
| Key Files | SC9832_Plane7574S_scatter.txt, preloader.bin, boot.img, system.img, vendor.img, nvram.img |
Device Specifications
| Specification | Details |
|---|---|
| Model | Digma Plane 7574S 4G |
| Chipset | UNISOC SC9832 (Quad-core 1.4 GHz Cortex-A53) |
| GPU | Mali-T820 MP1 |
| RAM/Storage | 2 GB RAM / 16 GB eMMC |
| Display | 7″ IPS 1280×800 |
| Battery | 4200 mAh Li-Polymer |
Required Tools & Drivers
- SPD Upgrade Tool R27.24
- Spreadtrum USB Drivers v4.20.0201
- Windows 10 PC, USB 2.0 cable
- Disable antivirus, use direct USB port
Refer to our SPD flashing guide for step-by-step details: How to Use the SPD Upgrade Tool to Flash Your Smartphone.
Step-by-Step Flashing Procedure
- Backup Critical Partitions:
- Read back
nvram.imgandvendor.imgin SPD Tool → save backups.
- Read back
- Load Scatter File:
- Select
SC9832_Plane7574S_scatter.txtvia Scatter-loading.
- Select
- Configure Download Mode:
- Uncheck
preloader.bin→ select Download Only → save profile “Plane7574S-20171221”.
- Uncheck
- Connect Device:
- Power off tablet → hold Volume Up → connect USB → wait for COMx detection.
- Execute Flash:
- Click Download → monitor progress → complete when “Download OK”.
- First Boot:
- Disconnect → power on → allow up to 4 minutes for setup → test camera and connectivity.
Recovery Results
✅ Case Closed
- Boot loop resolved; device boots in 30 seconds
- Camera functionality restored without errors
- Wi-Fi and cellular networks stable
- User (Li Wei) resumed gaming and streaming seamlessly
Advanced Tips & Community Resources
- Monitor CNX and XDA for SC9832 kernel optimizations
- Check Chinese firmware forums for regional CSC modifications
- Use SPD Tool’s Format on UDISK only if eMMC errors persist
Share Your Investigation
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