Airtel new router: Sercomm AOT-4221SR

Was anyone able to get DLNA and UPNP work through this router? I connected a USB drive to the USB port and wanted to stream local videos, but I see empty folders in my media apps. Any suggestions?
 
I am trying to configure my Airtel AOT-4221SR router as a universal repeater, but the option is not available. Can someone suggest an alternative way that can extend my Wi-Fi coverage without requiring a wired connection?
 
After some back and forth communication with Airtel I managed to get bridge mode enabled on AOT-4221SR and got my TP-Link router setup for Wifi. However, I'm unable to turn off the wireless signal on AOT-4221SR since the option to do that is greyed out. Has anyone managed to turn it off?
 
Back