關於「Singtel Prepaid top-up」標籤，搜尋引擎有相關的訊息討論：

Prepaid Top Up - Singapore - Singtelwww.singtel.com › mobile › prepaid-plans › hi-topup-cardshi!Account Notice – Singtelhi.singtel.comPrepaid Plans - Singapore - Singtelwww.singtel.com › personal › products-services › mobileTop up manage account - Singapore - Singtelwww.singtel