....go to a store for the SIM or got one from someone else (unused SIM at home or from a friend) ??
Did your carrier activate the SIM into their billing system?? If you didn't activate the SIM, it will not work. Which cellular carrier??
Do you know what an OLED TV is?
CNET explains how OLED technology differs from regular TVs, and what you need to know to make the right shopping decision.