We assume your idea modem is already unlocked and support any sim cards.
Download this Compressed File.
Close Modem software if opened.
Un compress the file to the desired location shown on it. If not possible, un compress it to another location and copy it to the desired location.
Restart modem software to apply change.
Once you have restarted your modem/ dongle, you will see a new tab called ‘Call’, where you can make voice calls via your computer itself.