In Jakarta, Indonesia, Siti relies on her Digma Citi Z560 4G tablet for video calls and online classes. After a corrupted firmware update left her device stuck on the boot logo and 4G disabled, she reached out to local tech forums and XDA. This article chronicles her successful recovery using the official MT6735M V20170602 Android 6.0 firmware.
User Experience: Siti’s Recovery Journey
👤 Profile
Siti is a university student in Jakarta who depends on her tablet for remote learning. When her Citi Z560 froze during an OTA update and refused to boot, she posted logs on “TeknoJakarta” and XDA. Community experts collaborated to restore her device.
Symptoms & Community Clues
- Boot loop: Digma logo displays 7 seconds then restarts
- 4G module missing—device only showed “No service”
- Indonesian forum reports pinpointed corrupted
nvram.imgfrom interrupted flashes - XDA thread suggested SP Flash Tool v5.1824 for MT6735M devices to prevent DRAM init errors
⚠️ Critical Warning
Flashing without backing up the nvram.img partition can erase IMEI and network settings. Always perform a Readback of NVRAM before proceeding.
Firmware Package Details
| Filename | Digma_Citi_Z560_4G_CS5021ML_MT6735M_20170602_6.0.zip |
|---|---|
| Size | 910 MB |
| Android Version | 6.0 Marshmallow |
| Key Files | MT6735M_CitiZ560_scatter.txt, preloader.bin, boot.img, system.img, nvram.img |
Device Specifications
| Specification | Details |
|---|---|
| Model | Digma Citi Z560 4G (CS5021ML) |
| Chipset | MediaTek MT6735M (Quad-core 1.3 GHz Cortex-A53) |
| GPU | Mali-T720 MP2 |
| RAM/Storage | 2 GB RAM / 16 GB eMMC |
| Display | 8″ IPS 1280×800 |
| Battery | 4000 mAh Li-Polymer |
Required Tools & Drivers
- SP Flash Tool v5.1824
- MediaTek USB VCOM Drivers v1.0.25
- Windows 10 PC, USB 2.0 cable
- Disable antivirus, use direct USB port
See our complete guide for MediaTek flashing: How to Flash Stock Firmware to MediaTek MTK Smartphones.
Step-by-Step Flashing Procedure
- Backup NVRAM:
- In SP Flash Tool → Readback → add
nvram→ click → save backup.
- In SP Flash Tool → Readback → add
- Load Scatter File:
- Select
MT6735M_CitiZ560_scatter.txtvia Scatter-loading.
- Select
- Configure Download Mode:
- Uncheck
preloader.bin→ choose Download Only → save profile “CitiZ560-6.0”.
- 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 → verify 4G in Settings → About Tablet.
Recovery Results
✅ Success Metrics
- Boot Loop Resolved: Boots in 30 seconds
- 4G Connectivity Restored: Stable LTE signal in Jakarta
- System Stability: No reboots over 24 hours
- User Feedback: Siti resumed her classes and calls without issues
Share Your Success Story
Did this guide rescue your Digma Citi Z560 4G? Share your recovery logs, unique fixes, and performance insights below to help strengthen our global firmware community!
