How do I use the On-Demand International Roaming function? SMS with text content 'CF Pin # OverseasNumber' to +65 9229 5935. The system will reaply you with a Singapore number which is called Virtual Number. Divert all calls on your Singapore mobile to this number and you will be able to receive your Singapore mobile calls on the overseas number when you are travelling. More details about On-Demand International Roaming here.
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