htc sense - How do I import all contacts from a SIM-card to an Android phone?

My mother have got a HTC Wildfire with Android 2.2.

Now I want to import all contacts from her old SIM-card to the phone. I did it and it worked. Then I switched to the new SIM-card, and now when I start the phone, the contacts has disappeared.

How can I import the contacts from the old SIM-card to the Android phone? This is a really annoying problem.

Answer

I found a pre-installed app on the HTC Wildfire Transfer Data that transferred all contacts and SMS from the old SonyEricsson phone, it was exactly what I needed.