Note: The device will reboot after installation. Do not power off the device while the update is processing. Method 2: Cloud Deployment via Sunmi OS
Go to Settings > Storage and clear the cache. Change from 4G cellular data to a dedicated 2.4GHz Wi-Fi connection and attempt the update again. Critical Safety Warning Sunmi P1 4g Firmware
Firmware for Sunmi P1 4G combines standard Android components with vendor-specific drivers and proprietary modem/secure-element binaries; careful alignment of kernel, vendor blobs, modem firmware, and signed update workflows is essential for stable, secure operation. Thorough testing—especially of radio, payment/NFC, and power behavior—and proper signing and rollback protections are critical for production deployments. Note: The device will reboot after installation
Install the MediaTek (MTK) USB VCOM drivers on a Windows PC so the computer can communicate with the terminal in bootloader mode. Change from 4G cellular data to a dedicated 2
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: Perform a hard factory reset via Recovery Mode. Turn off the device, hold Volume Up + Power until the recovery menu appears, select Wipe Data / Factory Reset , and reboot. 2. "PMIC" or "BROM" Errors During Flashing Cause : Incorrect USB drivers or a faulty USB port/cable.