It turns out that I bought a phone from Amazon and it came to me with a custom ROM that I don't know about, the operating system has the bootloader blocked and they were in the lobby when I switched to the phone slot, it gives me an error and now it says that it has a damaged boat. I know how to solve this problem and I have always tried to flash the stock ROM but I have not been able to with this I would like to ask you if you know how I can solve this problem if you can help me