According to a tweet by Bank Security (https://twitter.com/Bank_Security/status/1343646616490815493) a database dump has been circulating containing PII, Phone Numbers and ICCID of 2.5M sim cards. As a response, Ho-Mobile will replace SIM cards for free if requested.
Caveat: SIM will be replaced only by visiting a participating store in person. This is not always easy / possible, especially with ongoing COVID-19 transit restrictions.