V3.212
System:
-
- Based on openwrt 19.07.8 (AR150,MIFI,AR300M,USB150,N300,AR750,AR750S,X750,E750,XE300,MT1300,MT300N-V2,MV1000)
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- Based on QSDK11 (B1300,S1300,AP1300,B2200)
The B2200 was, and still is, based on QSDK11. That’s OpenWRT 15.
You can manually update the second sub node through uboot: Debrick via Uboot - GL.iNet Docs