Do i have to remove my sim card while updating to ios 7?

I have an iphone 4 and i want to update it to ios 7 i'm just worried that do i have to remove the sim card before updating to ios 7

Once you get the new phone you take it out of the old phone and insert it on the new one takes 3 sec.

No the sim card can stay in but you will need to input the sim pin once you have installed the new operating system

No. You never had to do that & don't still.