Top up other Singtel Prepaid or overseas prepaid mobile numbers with hi!Share! You can send phone credits to another user easily via hi!App or hi!Account. How to top up for others on hi!App 1) Log in to hi!App (singtel.com/hiapp) 2) Select ‘Top Up For Others’ 3) Select country, number to top up and top-up value How to top up for others on hi!Account 1) Log in at hi.singtel.com 2) Select Offers/Add-ons 3) Select hi!Share International (overseas) or hi!Share Singapore (local) 4) Select country, nu