how do i put my contacts from phone to sim

i need to put my contacts from phone to sim on samsung s4

That hasn't really been an option for a while. On Android, you pretty much have to pick where you want your contact stored at the time of creation - phone memory only, Google account, Samsung account (in the case of Samsung devices), some other account. It's highly recommended that you save them as Google contacts as those are 'portable' to future devices by just signing in to your Google account.