![sct device updater install error sct device updater install error](https://shop.fullforcediesel.com/assets/images/023680c3f8afca6fe56e4f8c35e2b715.jpg)
You can either plug it into your computer or you can plug it with your truck.
![sct device updater install error sct device updater install error](https://www.morepowertuning.com/assets/images/x4_box_3tunes.jpg)
If you are planning to buy a used SCT tuner then you have to know whether it’s locked or unlocked. How do I know if my SCT tuner is unlocked?
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However, you have to know how to unlock SCT X4. One of the best tuners you can find out there is SCT X4. And for that purpose, you can use a tuner. Are you satisfied with the performance your car is providing? If you are not then let me tell you there is hidden potential in your car that needs some unlocking.