: Optimized firmware ensures the modem can seamlessly switch between Wi-Fi and 4G, which is vital for mobile vendors like food trucks or pop-up shops.

: Supports 4G/LTE, Wi-Fi (2.4G/5G), and high-speed thermal printing (58mm). Updating Firmware (Official Methods) Updating is primarily handled through the SUNMI Cloud platform or the device's built-in tools: OTA (Over-The-Air) Updates : The standard way to receive system iterations. System Update app on the terminal.

Kernel and kernel modules

: 5.5-inch HD screen for clear visibility in various lighting. Printing : Built-in high-speed thermal printer (58mm width).

: Because it is a financial payment device, switching to "debug mode" or attempting to flash unofficial firmware is irreversible and will result in a permanent "risk" watermark on the screen, potentially disabling payment functions. Official Resources