Finding custom firmware for the Huawei B535-232 is difficult because Huawei uses proprietary HiSilicon chipsets that lack upstream Linux support, making official OpenWrt or similar standard custom builds largely unavailable. However, community-led "modded" firmwares exist that add features like bridge mode, TTL mangling, and band selection. Key Resources for Custom/Modded Firmware
Future Work
Nothing. Just a dead black box.
Flashing custom firmware carries a high risk of bricking the device. Most modern Huawei routers require a physical "boot pin" (short-circuiting points on the motherboard) to enter a state where custom firmware can be flashed via the Huawei Multicast Upgrade Tool . huawei b535232 custom firmware link
Background
If you plan to modify or flash the device manually, these specialized tools are frequently cited by the community: Finding custom firmware for the Huawei B535-232 is