history calls make from iphone device

hi!

From the iPhone we call only see the last 100 calls made from our device. Isn't there a way to check all the calls made from the device (not the operator, but from the device). The reason is because from the operator they are saying that I have made calls (one minute call each) to Indonesia, Philippines and Switzerland... that I did not do it. They ask me to show them the records of my calls from April... that I don't have access anymore. Can you please help me out to find a way to have this records?

Best regards,

CMR