Sprint's and Verizon's Sim cards are only for access to the 4g LTE network along with activation the phone. They do not store information like they do with GSM phones. If your needing to get contacts off of a sim card then you will need to take it to a store that has a cellebrite machine to pull them off. If you can however get access to those contacts directly from your old phone then you can simply bluetooth them over, save them as a .vcf, save them to google, email them to yourself, among many other options Samsung smart switch included.