How to burn the bootloader onto a bare chip without using an Arduino board How do I burn the UNO bootloader onto ATMEGA328P-PU without using an Arduino Uno board. That is burn directly from my PC or Android device??

I've tried nothing, I don't know a thing about microcontrollers ☺
The short answer is, you need a AVR programmer

It is a tutorial on the Arduino website:

https://www.arduino.cc/en/Main/Standalone

And the section Bootloading your chips OPTIONAL will answer the question.