If your decoder is a UEC or Coship, it would take a SMART CARD, which is the sim card lookalike. If you wish to subscribe to Showtime, the best place to hit is Starlink!
Their service team is one of the best, and if you subscribe to any showtime packages, they will come and even change the decoder you have if need be, completely free of charge!!!!

If you wish to check out their new packages and offers, please call them on 428 3888, and the customer care center will be more than glad to answer any and every question you have!