Apple ipod

iPhone, a couple of questions ……?

How I can import contacts stored in SIM card (which I am using it with T-Mobile (UK)) on my new iPhone? Will I have trouble using one of the features available to iPhone? I want to stay with T-Mobile, O2 instead of changing.

See the following link: http://www.wireless.att.com/answer-center/main.jsp?t=solutionTab&solutionId=KB81228

How to import sim contacts onto iPhone