Mobile operator Tele2 Estonia has introduced a mobile application enabling users to top up the balance of their Smart prepaid cards from another handset or tablet. The holder of the prepaid card can send a top-up inquiry to a certain telephone number using the application. Top-ups are possible from another device without the inquiry, too, and regular automatic top-ups can be made, as well. Recharges are possible using either a postpaid or prepaid balance. The free application for Android-powerd devices is available for download on Google Play.