How To Block Outgoing Calls On Samsung. +65* (for singapore, as this is not an isd. 1 open the phone app.
2 then, tap block numbers. 2) bar outgoing for the idd you can add 2 rules +* 00* 3) never bar outgoing.
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3 tap the more options icon (this may appear as three dots) or for older models, you will need to tap the menu button on your device. 4 next, tap the add icon (the plus sign) to add the contact to your block list.