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Contacts with the Modem
Picks the USSD string from balanceUSSDString.txt
Dials USSD and pick up the current balance
Picks Short Codes/MSISDNs from number2SendSMS.txt
Dials USSD and pick up the balance again
Continue the process until it sends SMSs to all the listed Short Codes/MSISDNs in number2SendSMS.txt
Usage
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Connect a Phone/Modem with USB data cable to PC
Define the USSD string (Ex. *124#) for balance query to balanceUSSDString.txt
Define the Short Codes/MSISDNs to number2SendSMS.txt on which SMS tariff need to be tested
Make sure you have .Net Framework 2.0 installed in your system
Run TariffCheckup4SMS.exe