How can I see only phone contacts, not SIM contacts?

I have a Dell XCD35. My phone book was showing phone contacts as well as SIM contacts. So when I see the list it shows some contacts twice. I don't want that, so in display option of contacts I just unchecked SIM contacts, which solves the problem in the Contacts app. But I face the same problem when I am composing a SMS message. When searching for contacts it shows both Phone and SIM contacts. Is there any way to disable SIM Contacts everywhere?