Phone not have only cpu inside, it have many other components and also have operating system called android.
Many brand also have own security implemented.
In phone not only the cpu is important, phone brand and model is also important.
Also seems you not know nothing about bypass security or usage of right da loader
Is very complicate to explain all this, this is very basic knowlege about phone.
If this is your first phone, try to learn about this basic things, will be very helpfull for you in future.
Also, you can't use readed firmware from this cpu.
For this generation of cpu, will be accepted only factory signed firmwares, readed from phone firmware will not work.