For the 15.28 sim only plan,
Is there a way to check the 50gb free Malaysia monthly data usage stats?
is it a 5G SA plan with same speed as 5G enhanced core plan? Are standard calls routed by VoLTE or VoNR?
when is the ideal time to recontract this plan before 12 months is up? Based on terms, all the bonus data and included talk time is ceased after the contract ends
1. Not sure, never use the roaming feature yet.
2. Speed should be the same (can reach above 1Gbps).
However, the "Enhanced Core" plan and even the two "Enhanced Lite" plans may well have a bit higher priority since it is labelled as "5G+ Enhanced". The S$15.28 per month plan does not have such label, even though it also supports "5G+".
3. If you are already on the S$20.37 per month plan or S$15.28 per month plan or other Singtel SIM Only plans with 12 months contract, you can usually carry out recontract at the 11th or 12th month. Singtel may also send you recontract offer earlier and then you can also carry out recontract earlier if the offer is the right one for you.
If you are on Singtel 24 month contract, then better only recontract to the S$15.28 per month plan after contract expires, or just a few days before.
If you are on the new Singtel SIM Only plans without contract (eg: S$40 per month "Enhanced Core" plan), then you can try to recontract to the S$15.28 per month plan just after one month, or a few days before one month. This is a trick some users use to jump into the S$15.28 per month plan, no guarantee it will always work. If not working then you may have to port out to other providers.