For those who get the Nokia XS-240X-A ONR (new users seem to get this most likely), if you do not want to pay Singtel S$10 for the bridging, and you can take some risks, you can try the manually bridging method below.
Standard disclaimer: YMMV, proceed at your own risk.
https://forums.hardwarezone.com.sg/...te-f8648p-superadmin-password.6946718/page-17
Those who get ZTE F8648P ONR with new FW may be out of luck as of now. It used to be easy to bridge but then new FW updates seem to make it not able to be bridged -- at least so far no reports of success. Good thing is that those who have bridged the older FW seem to keep the bridging after the FW updates. At least that is my experience.
BTW, some users managed convince to waive the monthly bridging charges.
For the Nokia XS-240X-A ONR, after the bridging. you actually get two working networks and two public IPv4 addresses.
Network 1 with one public IPv4 address --> ONR bridged port (usually the 10G port), for your own router
Networ 2 with another public IPv4 address --> ONR's remaining unbridged ports are still working.