... Printer 1. Airtime Recharger, Prepaid Airtime, Money Transfer 2. GPRS, IVR, SMS, STK, USSD Key Words: cell airtime, sms printer, top ... agent uses our Airtime Recharge Device by ways of SMS, IVR, STK and USSD etc. to pay the bill. This is ... : English, Spanish, Arabic, Thai, Italian etc.Multiple charging channels: GPRS, IVR(voice), SMS, STK or USSDStores charging records such as charging ...