Back to your carrier to solve this one. They'll reload the phone. There are prior discussions on this and you admit it's too technical. So let your carrier fix it.
Every time I try to turn on my Samsung Galaxy Core Prime in the top left corner it says "Custom Binary Blocked by Reactivation Lock. SECURE FAIL: KERNEL." I have no idea why/what this is or how to fix it as I'm not very tech savy and so I really need help lol. Any help/advice will be greatly appreciated, thank you!