Action Required: Firmware Update for ST-004 / ST-005
If your device is currently running firmware version V5.16 and you would like to use mobile payment — there is a known bug affecting mobile payment running time in this version:
⚠ V5.16
The firmware version is shown on the LCD screen when the device powers on:
A new firmware update (V5.31) is available and recommended. This update fully resolves the mobile payment issue — once updated, everything will work perfectly. Please follow the step-by-step update guide, or contact our support team if you need assistance.
💡 If you only use coins, you can safely ignore this update.