That is still cheaper than the S$30-60 or higher people need to pay for the original plan.
Zero1 S$9.90 “1GB to Unlimited” plan is of great value to many users and can be useful secondary plan even for heavy users. Still it may not be good enough to be the main plan.
Ref:
https://zero1.sg/plans
Circle.Life S$0 plan is an interesting plan and seems to be perfect for light users.
https://pages.circles.life/flexiplan/
Combine the two might be a good replacement for me — I am paying around S$43 (S$(42.9+5)*0.9=S$43.11) for the combo 2 with 2GB only data but with SingTel Circle plan benefits (annual handset upgrade is valued at S$350 by SingTel). Two years with two subsidies mean S$700 value, so effectively two years the payment is S$(43.11x24-700)=S$334.64 or S$13.94 per month. This is cheaper than the S$20 SingTel SIM only plan I am thinking of switching to in the future. But the S$20 SIM only plan comes with 5GB (or 10GB now with promotion) data which is way better than the Combo 2.
The S$350 value is roughly correct for iPhone and medium to higher end Android phones. I got my Huawei P20 at S$278 whereas Huawei offer price for 12.12 P20 price is at S$648.
So it comes down to whether it is worth to buy a subsidised phone every year. I think no need since effective economic life span of iPhones are about 3-4 years and Android phones are probably about 2-3 years. So no need to get new phones every year.
Just a summary: two options to replace Combo 2 plan
1) Cheapest option
S$9.9 Zero 1 plan plus S$0 Circle.Life Flexi plan, 2GB data and then unlimited throttled data
2) S$20 SIM only plan, 5GB data or 10GB with promotion now
I think I will choose Option 2 in the future when my contract expires in two years time. Probably only SIM Only plan exist at that time.