Don't let outdated software slow down your business. Keeping your terminals up-to-date ensures the best experience for your merchants and end-users.
: Unlike standard Android, the firmware includes a dedicated SDK helper class for seamless interaction with the built-in thermal printer and scanners.
Boot the device into Android Recovery Mode. Turn off the device. Hold the Power Button and Volume Up button simultaneously until the recovery menu appears. Use the volume keys to navigate to Wipe Data / Factory Reset and select it using the power button. If a factory reset fails, a manual firmware re-flash using the steps in Section 4 is required. Issue 2: Thermal Printer Stops Working Post-Update
Note: Proceed with caution—modifying firmware usually voids warranties and carries a risk of bricking the device! Option 2: Standard Maintenance & Troubleshooting Business owners or POS managers. Sunmi V2 Firmware
If the device is stuck at the Sunmi logo, a manual hard reset might be necessary. This is done by holding the buttons simultaneously while turning the device on. Advanced: Flashing Sunmi V2 Stock Firmware
Perform a factory reset via hardware buttons. Boot into Recovery Mode, select Wipe data/factory reset , confirm, and then select Reboot system now . Security and MDM Restrictions
A green checkmark popup indicates a successful flash. Disconnect the USB cable and hold the Power button to boot the terminal into clean stock firmware. Common Firmware Troubleshooting & Error Codes 1. Bootloop or "Sunmi" Logo Freeze Don't let outdated software slow down your business
Note: Sunmi divides updates into "Important Packages" (automatic) and "Minor Updates" (optional/manual), which can be managed via the Sunmi Partner Platform. Troubleshooting Sunmi V2 Firmware Issues
Changing the firmware on a POS device isn't as straightforward as a standard smartphone. dafish7/Sunmi-v2-Firmware - GitHub
There are two primary methods to deploy or change firmware on a Sunmi V2 terminal: official over-the-air deployment and local manual flashing. Method 1: Official OTA Updates via Sunmi Cloud Partners Boot the device into Android Recovery Mode
If an update is available, read the changelog and tap Download . Once downloaded, tap Update Now .
Custom DNS, firewall restrictions, or incorrect device time settings.
Disclaimer: Manual flashing carries the risk of permanently bricking your device. Proceed at your own risk and ensure you use the exact firmware version designated for your hardware model (e.g., standard V2 vs. V2 Pro). Prerequisites A Windows-based PC. A high-quality USB Type-C data cable.