I have an Airtel broadband I have tried all the steps but still my NAT type is stict

Not to be mean here , but that is NOT a very good router ... i'll give you a link to our hardware page on it and you can look at the "known issues" and maybe work around it...

forums.xbox.com/.../3165.aspx

@chalice sorry to here that's happening

here's how your gonna fix your issue try restoring the gateway back to factory defaults. this is going to get your nat table refreshed completely and getting everything a new ip address and nat info not to mention the network ssid and password go back to
defaults. I like to call this digital Alzheimer's because the gateway does remember but wants to act like it doesn't . (trying to keep it simple ;cD )

but as stated before the gateway doesn't support more then one gaming console,

not saying you have two xbox ones but your gateway sees each one as two because of the fact that it has a wired mac address and wireless mac address and or the fact that it could restart itself and re-assign a different ip address to the same device ( which
does happen from time to time )

let me know how things turn out !

like my post ? please give it a like !

:cD

Hey have you tried the steps here?? https://support.xbox.com/en-GB/xbox-one/networking/nat-error-solution

yes I have done so but my NAT type is open but is still disconnects me

Update... No NAT type now, says I'm behind a firewall yet Live is still working. Tried with both home & mobile broadband with the same outcome! Please help!

My NAT type was open before following the steps and was open when I attempted to talk to my friends through the party chat. I went ahead and followed all the steps you've provided anyway, my NAT type is still open, and I still cannot hear my friends nor
can they hear me.