Right now, my D-Link DPN-FX3060V (set to bridge mode) is getting capped at 200/50 Mbps after a few days or about a week of use.

I’ve looked through the history threads and found someone shared the firmware, versions v2.0.3 and v2.0.6.

Which version is more stable for bridge mode?

Also, is it safe to update the firmware ourselves? I’m concerned that the update might cause issues like losing network access, or if it might require a technician to reconfigure settings on their end.

Can I know is either version can solve the drop speed issue?

WTF? 
If 100M-1G plan all going to CGNAT confirm have congestion issue...
I don't think the gateway can cope with it.

First, check your WAN IP address as seen on the Internet on ipchicken.com.
Then, log into your router and check your WAN IP address as displayed in the router settings page, if it matches with the WAN IP address above, all good. If it is 100.x.x.x, then you’re CGNAT-ed.

getting 300 KB/s for my 800Mbps connection, guessing routing to singapore somehow?

Support is poor, it takes a very long time for restoration if there's a service fault

But, their International routing is pretty good as almost everything international is routed through their SG gateway

No answer for you but just curious.

Are you on landed or high rise?
At your exact location, do they use someone else infra (from who) or own infra?
If using someone else infra, do they use L2 or L3 services?

Is this the temporary upgrade to 1Gbps for 24 months and after that back to 500Mbps

Just got the 1Gbps at rm159 and 6 months waiver . Dem fast. (This deal not advertised)

Unfortunately even for my great router (and many expensive router) only can reach wifi 920 speed at best . I think ok la

Old unifi customer ought to check it out, totally pricing unmatched by anything in the market now

wont work GPON need OMCI AND PLOM PASSWORD AND SERIAL NUMBER AND MAC ADDRESS
cannot due need OMCI AND PLOM PASSWORD AND Serial number and Mac address for TM

You can only use the gpon provided by TM. My old white gpon broke, luckily they gave me a spare which i replaced.

Wonder if i can get another free one from them, in case it breaks again.

A cheapo version for TM. Too bad we cannot use our own gpon freely.

This was the 2.5g gpon provided by TM. They just stick their sticker onto it.

Why would you want to use this product? Plenty of forumers already reported that they face speed and stability issues with this

That's why even TM discontinued and replaced this with the Skyworth GN630 black with 2.5G port