5G on GOMO

It is mentioned on their FAQ:

6. Are there any features that cannot be used on the GOMO plan now?

GOMO currently does not support these features:

Incoming calls, Outgoing calls and SMS while roaming overseas
Voice over LTE (VoLTE)
International outgoing SMS from Singapore
Outgoing local calls to 1900 numbers
Incoming & Outgoing video calling
Incoming and outgoing MMS
NFC SIM Card
eSIM
Transfer of ownership
5G
Hang tight, we’re working hard to bring them to you!

https://gomo.sg/faq