From Optus: Hi YUWAT, we'd value any feedback on your prepaid recharge on 21/12. Reply via free SMS or click the link below. Q1 of 4: Based on your recharge experience, how likely would you be to recommend Optus to your friends and family? Reply between 0-10, 0=extremely unlikely, 10=extremely likely. http://survey.optusfeedback.com.au/?o=apazwd2vrn