I want to use the MR6400 v4 router as a Wifi bridge with my other router. There doesn't seem to be any option available to enable WDS Bridge. Is there any custom build available to get this option?

I am using Indian Airtel 4G SIM card in my MR6400 model V4, with firmware version 1.10.0 0.9.1 v0001.0. I am facing frequent network drops. As long as I am using the internet, it works fine. However,