If you want to delete the Contact from your Sim then please follow the below steps:
1. Goto Menu > Contacts Click on Option Button, Click for More options.
2. Click On Option You can see 2 Options Copy Sim Contact to Phone or vice versa.
3. Before going a ahead copy all the contact to your phone memory by selecting all contacts of your sim.
4. Now you can copy all the contact to your phone memory after selecting them.
5. Go back to transfered contacts of your phone memory, Now again goto contacts menu, click option You can see option like phone or sim.
6. Select the contacts which you want to delete from your Sim.