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Sending an SMS to a Foreign Number

Postman will add the +65 for you automatically when you enter the eight-digit phone number for a Singapore phone number. If you wish to send SMS to an overseas number, you need to change your excel column type to Text and add +country code in front of the number to send the SMS internationally. Once you have added the +, press save and you will be able to upload the file to send SMS to foreign numbers.
If you are having trouble editing your CSV file, you can open the CSV file using any text editor and add in the + for the phone number and press save.
In some versions of Excel, the + might disappear when you open the CSV file again. If the + disappears, do not save the file again. Try opening your file using a text editor to check if the + is still present in the file.