Plans   Availability   Call through Call through is a service where you can directly call your desired foreign country number. The steps to make a call from your landline or mobile phone are as follows:           How smartTALK works?                 Call back Call back function occurs when the originator of a call is immediately called back in a second call as a response. This helps to minimize the cost of outgoing charges on mobiles phones. The call back service can be used from a landline or a mobile phone to save cost when placing international long distance calls. The steps to place an international phone call are as follows:                   One-time Registration before using Call back                       To use Call back                 SmartTALK calling card is available at retail shops nationwide. For more info, please visit our website at www.smarttel.com.sg           Back to top     SmartTALK come in S$10 denomination and is available at retail shops nationwide.