Preheat the smoker to 225 degrees Fahrenheit. Fill the water tray as much as possible and use soaked wood chips if your smoker calls for them
Let the T-bone steak come to room temperature. Rub the salt and pepper on the surface, making sure you cover the sides as well
Place the steak in the smoker and let it smoke at 225 degrees F for around 45 minutes to an hour. Use a meat thermometer rather than a timer to know when the steak is done to your preferred level of cooking
Once the steak reaches the right internal temperature, take it out of the smoker. Heat up a cast iron skillet or grill pan, coating it with a little high-heat oil. Sear all sides of the T-bone steak for a few minutes on each side, then let it rest for 10 minutes before serving