How to use TATA SKY BB ONU + Router on a different ISP?

[razermk247]

Hi,

I had a Tata Sky BB connection in delhi, due to covid i have returned to my HomeTown. Here, my existing router is throwing problems so i decided to use the Tata Sky Router that i have as a substitute. But it seems to be binded to Tata Sky BB and that i cannot change certain settings to enable the same on my current ISP.
Is there a way to reset this? remove binding?
i tried factory reset, but it just keeps showing the buffer icon, and nothing happens.
Any help would be appreciated

 

[sng_shivang]

Which modem you have? You will likely have to flash an open firmware onto it.

 

[razermk247]

I have the Nokia modem G-140W-F.
Can i not flash it with the stock formware from the manufacturer's website?
is DDWRT a good open firmware to flash my NOKIA ONU+router with?