Seems need to do settings ?Received email from Giga :
Simply do two quick checks to ensure you are eligible to enjoy your 5G Pack:
1. Check if your device is compatible here
https://giga.com.sg/FAQs_Details.aspx?QuestionId=168
2. Ensure your location is serviced by 5G here
https://giga.com.sg/FAQs_Details.aspx?QuestionId=170
https://giga.com.sg/FAQs_Details.aspx?QuestionId=174