Users can apply to disable calls from overseas by contacting the telecoms company via phone call or SMS, or through their telcos’ apps.
All incoming calls from international numbers to users who opt in for this feature will be blocked, but calls made from Singapore numbers, like those using overseas roaming to call home, will still be received, the Infocomm Media Development Authority (IMDA) said in a statement on Jan 4.
You can now block international incoming calls on Simba by sending TPG by sms to 1218 and select option 4.
As for maxx, you can enable international incoming call barring from the maxx app.