The bootloader on a phone is comparable to the BIOS on a PC. If you reflash your BIOS with unsupported code (Openboot?) and brick it, you shouldn't expect the w

The bootloader on a phone is comparable to the BIOS on a PC. If you reflash your BIOS with unsupported code (Openboot?) and brick it, you shouldn't expect the warranty to cover you for this. It's the same principle. Now, whether they can legally void the warranty if you don't actually break something is another issue entirely, but they should not be held responsible if you do do something stupid that bricks the phone.