I see the confusion now, by free to modify I meant you can go and replace your operating system, bootloader or hardware. Do you need more RAM, just get some and

I see the confusion now, by free to modify I meant you can go and replace your operating system, bootloader or hardware. Do you need more RAM, just get some and put it into your MOBO, third screen? Just get it and plug-in. Recently I replcated screen in my laptop to a matt one, keyboard one with harder keys and it all works. When I want to change screen in my phone, I can't only one certain model will work as expected, some models might fix, but they won't support the same resolution, can't upgrade camera or RAM there, so basically, it's not my hardware, I have to use what manufacturer pre-selected for me.