The universal international prefix for mobile phones is a + followed by the country code.
To call internationally I suppose that you would prefix with 00 and for national long distance you would use a single 0. This is what the world (except US) does today. It ws not always this way and different countries used different internationl prefixes. However this prefix was always followed by the country code. Mobile phone operators realised very quickly that a phone could soon be outside their country. "Quick.", they said find a solution and the " + " sign was it.
What happens inside the carrier network is translated by the phone's software (the OS) to display whatever the programmer decided was correct. Thus different OS revisions can display different prefixes depending upon what was programmed when the OS was released.
You should try to move to a more recent OS and you will find the latest at the top of the 9700 forum. You can download and install this on your PC.
This link
http://crackberry.com/blackberry-101...ting-system-os will help you upgrade.
If you need help, please come back here.