YangZifan-BA7KVH FAGCI firmware:https://github.com/fagci/uv-k5-firmware-fagci-mod/releases CEC:https://github.com/phdlee/uvk5cec/releases
908612666 K6 wideband firmware, full-band transmission, 18MHz - 136MHz support for AM mode. Is this still available? Official new version of wideband.
YangZifan-BA7KVH 908612666 https://wiki.xanyi.eu.org/#k6v3_18to1300_all_tx.bin And https://wiki.xanyi.eu.org/#k6v3_18to1300_legal_tx.bin
908612666 The main issue was that after flashing multiple systems, the hidden menu in the firmware could not be opened, and the UV band restriction prevented access. I found one version that was too old (version 10).