This seems like a plan in direct response to U Mobile's U Home 5G plan

If it's truly "unlimited" then it could be considered since everyone is riding on DNB
(Gotta check the fine print in the TnC)

However 5G coverage in this case would be quite important as there's only 100gb quota for that
Where as U Mobile has it all sharing the 1000GB

As for hightechgadgets8 you can refer to the U Home 5G thread
There are some cheap ones around rm700 or so, performance will vary but the discussion about which is the best is over there
Most seen to suggest 3/EE UK rebranded Zyxel modems

Because 5G is using DNB infrastructure where as 4G is on telco own infrastructure

As such if you use these plans on 4G the speeds may be bad depending on your location

nope, there is a reason they have a more expensive plan that is intended for router use

those "invl co/io" links are referral links for the lazada/shopee (and other) platforms.... (Involve Asia affiliate marketing platform)
so yes, they do.

because the truth is, like with other telcos like umoble

they expect your usage to be low
they hope you dont finish it all

because typical phone use is just like, facebook, instagram, whatsapp

maybe youtube and tiktok a bit more heavy

where as in router/modem
you'll have many users using it at one time, downloading large content, etc.

Which is why most telcos do have a plan for modem use, but of course the cost is higher

Maybe unlimited plans are low priority during peak loads so they throttle "less important" usage