If your Cubot H2 is experiencing intermittent charging interruptions, unresponsive touch inputs, rear camera errors, or random bootloops, flashing the official stock firmware provides the most reliable solution. This expert guide includes the verified firmware download, concise SP Flash Tool instructions, and a troubleshooting section specifically tailored to the H2’s MT6735 hardware and known software issues.
🚨 Critical Pre-Flash Warning
Flashing will erase all data on your Cubot H2, including apps, photos, and settings. Back up your data before proceeding. Incorrect SP Flash Tool use can damage IMEI—follow the steps precisely. For full details and driver setup, visit: Comprehensive Flashing Guide for MediaTek Devices.
Device Specifications Verification
Confirm these match your Cubot H2 before flashing:
| Specification | Details |
|---|---|
| Model Code | H5201C / H2 |
| Chipset | MediaTek MT6735 (28nm, Quad-Core 1.3 GHz) |
| GPU | ARM Mali-T720 MP1 @ 450 MHz |
| Display | 5.0″ IPS LCD, 1280×720 HD |
| RAM/Storage | 1 GB RAM / 16 GB internal |
| Battery | 2600 mAh removable Li-Ion |
| Android Version | Android 5.1 Lollipop |
| Key Features | 13 MP rear + 5 MP front camera, GPS, FM Radio, fingerprint sensor option |
Official Firmware Downloads
| Filename | Date | Size | Download Link |
|---|---|---|---|
| Cubot_H2_H5201C_V14_20160408.zip | Apr 2016 | 692 MB | MediaFire |
| Cubot_H2_MT6735_V5.0_20160105_5.1.zip | Jan 2016 | 685 MB | MediaFire |
⭐ Recommendation: Use the V14 April 2016 build to take advantage of the latest camera ISP fixes, improved charging-IC calibration, and updated touch-panel drivers tailored for the MT6735 platform.
Required Tools & Drivers
- SP Flash Tool (latest version)
- MediaTek VCOM USB Drivers
- Cubot H2 firmware package (above)
Quick Flashing Instructions
- Install SP Flash Tool and MediaTek USB VCOM drivers on your Windows PC.
- Extract firmware and load
MT6735_Android_scatter.txtin SP Flash Tool. - Select “Download Only” mode to preserve IMEI and user data.
- Power off the H2, click “Download,” then connect via USB to start flashing.
- Wait for the green checkmark, then reboot your Cubot H2.
Troubleshooting & Optimization Guide
1. Charging Interruptions & Slow Charging
- Symptoms: Device stops charging at 80%, charger disconnected randomly, slow currents.
- Use original 5 V/1 A charger and high-quality cable.
- Clean battery contacts and Micro-USB port with isopropyl swab.
- Replace cable if voltage drops below 4.8 V under load (test with USB tester).
- Calibrate battery: drain to 0 %, then charge to 100 % uninterrupted.
- Flash V14 firmware to update charging-IC parameters and prevent false cut-offs.
2. Unresponsive Touch Inputs & Dead Zones
- Symptoms: Screen ignores taps near edges, swipe gestures lag, keyboard delays.
- Remove any screen protector to ensure accurate touch register.
- Reduce “Pointer speed” in Developer Options for better calibration.
- Enable one-handed mode: Settings > Display > One-handed mode.
- Test in Safe Mode to rule out launcher conflicts.
- Flash V14 firmware to restore touch-panel driver tuned for MT6735M sensor arrays.
3. Rear Camera ISP & Flash Errors
- Symptoms: Camera fails to focus, images dark, LED flash fires inconsistently.
- Clear Camera app data: Settings > Apps > Camera > Storage > Clear Data & Cache.
- Test flash in bulk: open camera, switch to flash-on, press volume key to trigger flash.
- Ensure firmware variant matches model (H5201C code).
- Flash V14 firmware to reinstall ISP and flash control firmware sequences.
- Use third-party camera app (e.g., Open Camera) for alternate ISP paths.
4. GPS Drift & Inaccurate Lock
- Symptoms: GPS locks slowly, location drifts 20+ meters, mapping apps fail in urban canyons.
- Enable AGPS: Settings > Location > Improve accuracy Wi-Fi & Bluetooth scanning.
- Clear AGPS data with “GPS Test” app > Manage A-GPS state > Reset & Download.
- Use clear sky view to acquire GPS fix, then indoor afterwards.
- Flash V14 firmware to update GNSS driver and satellite-constellation config.
- Test with GPS Test or GPSTools to verify drift and fix time improvements.
5. Random Bootloops & System Crashes
- Symptoms: Device restarts during use, stuck on logo after updates, spontaneous reboots.
- Wipe cache partition in Recovery: Power + Volume Up to enter Recovery > Wipe Cache.
- Uninstall recently installed apps via Safe Mode to isolate conflicts.
- Flash V14 firmware using “Download Only” to restore stable system files.
- Perform factory reset in Recovery if loops persist post-flash.
- Check for battery voltage fluctuations under load—replace battery if aging.
Unique Expert Recommendations
- Calibrate battery quarterly to avoid false charging cut-offs.
- Use Safe Mode to remove conflicting apps before flashing firmware.
- Clear AGPS data monthly for consistent GPS performance.
- Maintain 1 GB free storage to prevent bootloops in a low-RAM device.
- Replace aged batteries older than 24 months to stabilize power delivery.
- Disable auto-brightness to prevent DRV backlight PWM flicker issues.
- Backup logs via logcat when diagnosing recurring crashes.
Conclusion
Flashing the official Cubot H2 V14 stock firmware restores proper charging behavior, touch responsiveness, camera ISP functionality, GPS accuracy, and prevents bootloops on the MT6735M chipset. Follow SP Flash Tool instructions carefully, apply these device-specific troubleshooting steps, and maintain the V14 firmware to ensure reliable performance.
Success? Share your feedback below—especially if V14 firmware fixed your touch or charging issues so other Cubot H2 users can benefit!
