Can't read or write contacts to sim card.

Hey,

I have an issue with my phone where I can't read or write contacts to my VF sim card.

I tried other sim cards and the result was teh same with a 2degrees sim card and older VF sim card.

But I put in a spare Skinny sim card and it worked with that sim card. and I could read and write contacts to that sim card.

So I am assuming that it was the sim cards fault and not the phones.

Has anyone had a similar problem?

And can this be fixed, say a different sim or such?

and my phone is a sonim XP5300 if that helps at all.

Kind Regards,

Travers.