Not that I could determine, I'm only on a 50 Mbps plan. Although due to some misconfig on BSNL's side, I get 200 Mbps or so over IPv6. The HuaweiONT worked fine.
Yep, in that case, I would suggest going for a basic ONT like the Huawei. It's a pure bridge. Do note that Huawei ONTs do not support dual mode, so if you need GPON get HG8310M and for EPON get HG8010H.
Dont have the Huawei option here in NAgpur. Unless I wait for a month from AliExpress. And even then might come with the corona virus lel. So will pick up locally or Netlink. That netlink website contact hasnt responded in 2 days lol