If you are looking to modify your device, here is the current status of "custom" options: 1. Modified Web UI & "Modded" Firmware Most "custom" firmware for this model actually consists of Modded Web UIs
Block the router from reaching carrier update servers to prevent the system from automatically overwriting your custom firmware with a locked stock version. huawei b535232 custom firmware link
Labeled with a version string starting with 10.0.x.x or 11.0.x.x . If you are looking to modify your device,
Running the tool to "push" the firmware while the router boots up. Important Safety Warning Flashing firmware carries inherent risks. huawei b535232 custom firmware link