Haha if it is just TM's typical router I personally won't bother. But still it is your right, the router belongs to you and should not be taken by the installer.
TM will prioritise Unifi users first, only open to other provider after few months. I bet if you tell them you want to install Unifi everything will be done in a week.
On another note, how you manage to get Celcom to install?
From my experience, TM will take about 1 week to approve the transfer request, provided you do not have outstanding bill. Digi will only proceed to set installation date after TM has approve the transfer.
Just a side note, you can still use your Unifi for about 10 days after Digi fibre is installed, by having Unifi modem on port 1 and Digi modem on port 2.

When I went to inform TM about my transfer, they made me pay for another month and to show them the proof of payment on the spot. They said it will be pro-rated and the balance will be refunded to me in 2-3 months time. Is this standard practice?

TM will prioritise Unifi users first, only open to other provider after few months. I bet if you tell them you want to install Unifi everything will be done in a week.
On another note, how you manage to get Celcom to install?

I went to TM last Wednesday to tell them about my termination. I am still waiting for Digi to contact me about installation. How long does it take for them to install?

When I went to inform TM about my transfer, they made me pay for another month and to show them the proof of payment on the spot. They said it will be pro-rated and the balance will be refunded to me in 2-3 months time. Is this standard practice?

Received notification and phone call from Digi for installation this Saturday. BTW I heard from a friend that Maxis offers backup SIM card in their modem in case of fibre service interruptions. Is this true and does Digi give this service?

Received notification and phone call from Digi for installation this Saturday. BTW I heard from a friend that Maxis offers backup SIM card in their modem in case of fibre service interruptions. Is this true and does Digi give this service?

That's last time when I stay in a condo. Luckily I managed to terminate it without penalty due to my current location still don't have infra early this year. I used Maxis, Unifi and Celcom before, from my experience Unifi is still the best in term of performance like latency and speed. TM sometime will cap the port at exact bandwidth the other ISP needed. If you take 100M in Unifi, you get above the bandwidth you subscribed. Others get around 95Mbps only.

if i have received my order number means my registration is successful and only pending installation or are they still reviewing my application?

I believe it is just acknowledgement of your registration. Only when they confirm your area has port then they can proceed to arrange for installation.

Just have installed Digi fiber at my home. Anyone know how/where to put the dns 1.1.1.1 or 8.8.8.8? Already set the dns on pc but it's not working

Assuming you are given the same Zyxel EX3300-T0, go into the router page and choose broadband.
Then click edit on the ethwan and set your DNS there.

Yes. Same router. I checked it but it was filled with Digi dns both on primary and secondary, is it safe to change it?

Yes it is safe to change the DNS. Just don't kacau the PPPoE username and password.

I just installed Digi Fibre, and I realised that it doesn't come with a landline. My wife insist on having a landline for our home. I've checked with a Digi Store and was told only Unifi comes with landline, and I need to Unifi if I wanted it.
Is there any way to switch to Unifi without incurring the penalty?
Or any other way to get a landline with incurring too much extra cost?

I just installed Digi Fibre, and I realised that it doesn't come with a landline. My wife insist on having a landline for our home. I've checked with a Digi Store and was told only Unifi comes with landline, and I need to Unifi if I wanted it.
Is there any way to switch to Unifi without incurring the penalty?
Or any other way to get a landline with incurring too much extra cost?

subscribe separately for now(?) rather than incur penalty.