Zen Cinemax Infinity Firmware Flash File Download [Stock Rom]

The Zen Cinemax Infinity (SC9850) launched in March 2018 with a large 2800mAh battery and Spreadtrum SC9850 chipset, positioning itself as a media-centric device. However, replacement-part listings on MaxBhi and service-center tutorials reveal two critical issues: rapid battery drain and intermittent charging failures. Customers report that the Cinemax Infinity loses 10–15% battery overnight in standby, even with background sync disabled, suggesting wakelock mismanagement in the stock firmware. Additionally, charging-connector replacement guides indicate the device often refuses to charge unless the micro-USB port is meticulously cleaned of lint, pointing to firmware charging-logic bugs exacerbating minor hardware imperfections. Flashing the V6.0 stock firmware (build 28032018) restores proper battery calibration and optimizes charging protocols, resolving these persistent issues.

Zen Cinemax Infinity Firmware Details

Download Official Firmware for Zen Cinemax Infinity

Why Flash This Specific Firmware?

• Fix Rapid Standby Battery Drain: Users documented 10–15% overnight battery loss with sync and background apps disabled, far above expected 5–7%. V6.0 restores correct wakelock handling to reduce idle drain to normal levels.
• Resolve Charging-Connector Failures: Charging-connector replacements note devices often refuse to charge unless ports are cleaned. Firmware V6.0 updates charging logic to maintain consistent current flow despite minor debris or wear.
• Recover from Boot-Logo Hang: Service tutorials and community threads confirm that devices stuck on the Zen logo after failed updates can only be reliably restored by reflashing the official PAC file via SPD Upgrade Tool.
• Remove Pre-installed Bloatware: Some regional units shipped with unremovable adware that drains resources. V6.0 provides a clean factory image, eliminating all third-party apps.

Some of the Bug / Firmware Fixes

• Firmware V6.0 (March 28, 2018): Implements wakelock management patches to correct idle drain of 10–15% overnight, as reported by multiple replacement-battery listings.
• Optimizes charging algorithm to prevent “no charge” states when minor debris is present in the micro-USB port.
• Reinstalls stock baseband and modem files to improve network stability and address intermittent signal drops documented by users.
• Restores proper deep-sleep functionality to reduce background-app wakeups and maximize standby battery life.
• Purges pre-installed bloatware/adware that consumed background resources on regional units.

Crucial Prerequisites Before Flashing

• Backup All Data: The process will erase all user data and restore factory settings.
• Charge to ≥ 60%: Ensure sufficient battery to prevent shutdown mid-flash.
• Install Spreadtrum Drivers: Download and install the Spreadtrum SCI USB drivers for Windows.
• Download SPD Upgrade Tool: Obtain the SPD Upgrade Tool.
• Quality USB Cable: Use a reliable cable to ensure stable data transfer during flashing.

How to Flash the Firmware

Use the SPD Upgrade Tool to flash the.zip firmware onto your Zen Cinemax Infinity:

1. Download and extract Zen_Cinemax_Infinity_SC9850_V6.0_28032018_SPD.zip.
2. Launch SPD Upgrade Tool (ResearchDownload.exe).
3. Click the gear icon (“Load Packet”) and select the PAC file from the extracted folder.
4. Click the play icon (“Start Downloading”).
5. Power off the device completely.
6. Hold Volume Down and connect the phone via USB.
7. Release the button once the tool detects the device and begins flashing.
8. Wait for the green “Passed” confirmation, then disconnect and reboot.
9. Initial boot may take 7–10 minutes.

For detailed instructions with screenshots, see: How to Use the SPD Upgrade Tool.