Since currently Spitz AX on Amazon still has stock left, what you may buy is old firmware, please check the firmware version after receiving it.
If the firmware is v4.7.4 or newer, no upgrade is required.
If the firmware is below v4.7.4 (such as 4.4.13), please follow the above guide to upgrade uboot and firmware to the latest version.
If you have any questions about the upgrade, please email [email protected] to contact our support team.
TIA!
Update1:
Since we found it may cause the uboot flashing failure on MT2500. Details are still under analysis.
If you have not perform the upgrade, please try with Chrome or Microsoft Edge. DO NOT to use Mozilla/Firefox.