Other than the FlexiMax, three other plans gets an upgrade and they are FlexiLite, FlexiGo and FlexiPlus.
The FlexiLite is the cheapest at $10 (S$5 for first 3 months) and comes with 180 GB of data, 200 minutes talk time, 50 SMS 1 GB data roam and 100 mins. IDD. This is pretty good if it stays at $5 forever for lite users.
As for FlexiGo, it is priced at S$15 per mth, it comes with 280 GB of local data, 500 minutes of talktime, 100 SMS and 3 GB of data roaming (Applicable for use in Malaysia, Indonesia, Taiwan, Hong Kong & Thailand).
The FlexiPlus is priced at S$18 per mth, it comes with 380 GB of local data, 800 minutes of talk time , 150 SMS and 30 GB of data roam (30GB roaming data. Limited to 1GB per day – Applicable for use in Malaysia, Indonesia, Taiwan, Hong Kong & Thailand).
FlexiMax is the ultimate plan for travellers and it comes with 480 GB of local data, 1000 minutes of talk time, 200 SMS, 200 minutes IDD and 63 GB data roam (60GB roaming data. Limited to 2GB per day – Applicable for use in Bangladesh, Cambodia, Macau, Saudi Arabia,USA, Hong Kong, Indonesia, Malaysia, Taiwan, Thailand, China, Korea, Philippines, New Zealand, Qatar, Sri Lanka, Australia, Brunei, Japan, Vietnam, Myanmar, (Pakistan, UAE – coming soon). 3GB – Applicable for use in Malaysia, Indonesia, Taiwan, Hong Kong & Thailand). It is priced at S$12.50 for the first 3 months.
There is no mention of 5G so it is presumed to be 4G only plans.