I ald ask about converting a SIM only plan to bundle, but not possible.
Need to cancel first and subscribe to bundle after that.
Why so hassle to subscribe to their service?

Anyway just want to ask, if I get a stable service via unifi mobile BEBAS at 8 Mbps fixed constantly connected to band 40 2CA, is it good enough to subscribe to unifi Air device bundle directly?
So hassle to subscribe and unsubscribe the service many times.

Yep.
No issues at all.
I did ask TM Point about this, and they said some customers are being offered with Unifi Air if they are having issues with Unifi Lite because the copper line are not being maintained for so long, so they offer a SIM to these customers to test it.
If it is okay and stable, they will proceed with cancellation of Streamyx.
They have registered many customers outside of Unifi Air coverage area so far based on what I asked them.
And I did test Band 40 around Seremban, it seems they already did expand the Band 40 2CA coverage in many key areas but did not update the coverage map yet.

For me, I suggest you take the SIM only plan and test it on your phone.
It might have a different result based on an area.
Make sure your phone is able to support Band 38/Band 40.
In my case, they ask me to test it, if it is up to satisfaction, then proceed with it.
I cancel my Streamyx yesterday.

Of course I am happy. After using Streamyx 4 Mbps for 10 years, finally I get a more than 10 times the upgrade speed with Unifi Air.
Finally something worth paying for.

Make sure the modem support band 5/38/40.

I'm very happy with the speed. Way better than my 4Mbps streamyx.

B618 bundled with contract.

I'm under unifi air coverage. Even when using unifi mobile prepaid I get band 40 connection.
Not many users in my area I think.

What band did you get when tested on your phone?

Use app Network Cell Info

https://play.google.com/store/apps/details?...is.cellinfolite

Did you try subscribe the SIM only?

So that means you are getting good speeds whether on Band 38 or Band 40.
And for router, maybe you can opt to buy your own.
I saw many post saying the new ZTE modem is bad.

how do you know?

can pm location? i'll check for you since coverage map is not up to date

Maybe it is okay as long as your place got Band 40 and 38 coverage since this modem does not support Band 5.
And the speed of course will not match the power of B618 and B818.

That is why you should check what band is there using your Unifi Mobile BEBAS SIM.
If it is Band 5, better avoid it like a plague.
It is not fast at all.

I mean avoid subscribing to Unifi Air if your place only supports Band 5.
It is too slow for downloading especially on peak hours.

Well if you get better speeds with Digi Infinite, why you should cancel it?
I only proceed with this because this is the only line that is good enough for me.
Digi is slow and Maxis is unstable in my area, so that is the only choice I have.
I rather upgrade to Unifi Air with this speed than continue my 4 Mbps Sampahmyx which is unstable at night.

That is why you should check what band is there using your Unifi Mobile BEBAS SIM.
If it is Band 5, better avoid it like a plague.
It is not fast at all.

As shown below: