I found a new application for iPhone in Cydia called SIManager. You can manage your SIM contact in your iPhone. In this version (1.4 beta) you can also export your contacts to SIM card.
In order to install SIManager you must add the following repo in cydia then select SIManager package and install it.
The repository link does not come up in Cydia… what’s up?
Name(required)
Mail (will not be published)(required)
Website
<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>