Is there any open format for importing and exporting from/to any mobile phone. It doesn't have to be a smartphone, it could be a basic mobile phone. If any such thing exist, does is also support import/export from/to SIM as well?
Contacts is one feature which is universal in all phones so I am hoping this is some standard/format which could be used for doing this. In smartphone, it could be done by apps but what about the basic phones.
Any help/insight on this would be highly appreciated.