I want to unlock my prepaid phone kit device

Hello lucina112,

To confirm, are you looking to use your device with a different carrier? If so, How to unlock your iPhone for use with a different carrier has the information you're looking for.

Apple can't unlock your iPhone for use with a different carrier. Only your current carrier can unlock your iPhone.

"Contact your carrier

1. Only your carrier can unlock your iPhone. Contact them and request an unlock. After you submit the request, it might take a few days to complete. Contact your carrier to check the status of your request.
2. After your carrier confirms that they unlocked your iPhone, follow the steps below."

If this isn't what you're looking for, let us know more details about what you're trying to accomplish.

Regards.