check this that first intstall recovery install firmware upgrade then always ubi sysupgrade.itb
https://forum.openwrt.org/t/how-to-update-kernel-ubi-image-rt3200-belkin/93033/4
check this that first intstall recovery install firmware upgrade then always ubi sysupgrade.itb
https://forum.openwrt.org/t/how-to-update-kernel-ubi-image-rt3200-belkin/93033/4