if we are not existing subscriber, just apply through the official website? The RM139 (Entertainment RM49.90+ 500Mbps RM90) plan?

Can we cancel the Astro subscription immediately after they counter offer us?

if we are not existing subscriber, just apply through the official website? The RM139 (Entertainment RM49.90+ 500Mbps RM90) plan?
Yes correct.

Can we cancel the Astro subscription immediately after they counter offer us?
You can't cancel immediately because there's 24 months contract once the Astro service is activated. If the service is not even activated, then no contract la...

Why not you try call Unifi customer service, pretend and tell them you want to terminate Unifi service because you want to switch over to Astro Fibre's 500Mbps RM90 plan as it is cheaper.
Do not start the conversation by proactively ask them things like "What offers do you have for me?".
You can create stories like you're facing "financial difficulties" if you want.

Let's say if they didn't offer you 500Mbps RM90, then just say something like "It's okay, I'll apply for Astro Fibre", then end the call.
Wait for 1-2 days, see whether anyone from TM calls you back and really offer you 500Mbps RM90 or not (probably their other teams would takeover your case? I dunno, just guessing).

If you or anyone tried this and really works, do let us know here. 
Because it is easier than you apply Astro Fibre online, and somemore need to pay upfront payment of RM49.99*, and also perform eKYC there (upload IC all those), etc.

*RM49.99 is because of Astro One: Entertainment Pack, but it will offset on your upcoming Astro bill, if you really become Astro customer lah
No... The 500Mbps RM90 offer you see on Astro website, actually requires Astro TV subscription.

Astro no longer offers standalone Astro Fibre service anymore.

Yeah, you can try but mine is already out of contract.

I got subscribe Astro,
If you already have an existing Astro subscription, then yes, select that option will do (as what you highlighted in the image).

but my unifi 3.0 swu contract until around September
Terminating your Unifi SWU will incur penalty, isn't it?
I suggest you wait till about August first (1 month before your Unifi contract expires) then only you try this.

my SWU3.0 ending in Dec, do they supply new unifi tv box?

She said for plan no 2, 300 + Tv channels, they provide the unifi box for free.

how about plan 3??me dont know how hotstar works

Wait few more months will try it
Ya, will try around August on this, thanks for the heads up

asus router should had no issue setup with astro fibre right?

I'll not use Astro broadband because it's kinda broadband optimized for Astro decoder use.

As an example, u can't access this page if using other than Astro. The reason why it come as a pair, broadband+tv.

That's not true. This may be some technical issue with either your Astro account or your Astro box, rather than the ISP itself.
Let's discuss this on a dedicated thread about Astro here: https://forum.lowyat.net/topic/4574137

The decoder already in latest firmware. I can't access the page also with unifi-Air. Only saw someone with astro broadband can access it.

** My attached image was using unifi broadband.

how about plan 3??me dont know how hotstar works

Anyone else noticed that ipv6 is broken and causes a lot of websites to either load slowly or not load at all for the past few days? Disabling ipv6 in windows do help. I want to disable it in my router but for some reason disabling ipv6 causes my ipv4 to drop as well.

Edit: might be just tmnut dns for ipv6 is broken.

.
Seems to be working for me, heck using LYN via IPV6 too. Try switching to a proper DNS service (Cloudflare, Google etc)

As an example, u can't access this page if using other than Astro. The reason why it come as a pair, broadband+tv.

Can access just fine on unifi fiber.

Can access just fine on unifi fiber.