Transfer of SIM card to new iphone

See: Remove or switch the SIM card in your iPhone or iPad - Apple Support

and

Learn which size SIM card your iPhone or iPad uses - Apple Support

Also, note that the iPhone doesn't store user data on the SIM so transferring a card won't make the phone identical.

Re Then how do u get the data to transfer over

What are you wanting to transfer data from and what do you want to transfer it to?

If you are asking about transferring from an old iPhone to a new one, see: Transfer data from your previous iOS device to your new iPhone, iPad, or iPod touch - Apple Support

No data is stored on the SIM. The SIM just controls the connection to your cellular carrier.

Then how do u get the data to transfer over