Change XIAOMI MiWiFi (R2D) MAC Address , How To - HardReset.info
How to factory reset Xiaomi MiWiFi 4A router - Default Login & Password - How to Factory reset Your Router - Routers' Specifications, Manuals and Factory reset Information
Xiaomi routers - Login IPs and default usernames & passwords
Mi Router AX3200 firmware download: MIWIFI RB01 ROM