[codedokode]

My phone has an option to unlock a bootloader. But it would take time to find or build a custom ROM and install it and solve all kinds of problems with drivers and hardware.

And generally it is pretty decent model. It sends some data home but at least it doesn't have preinstalled adware like another chinese tablet I saw (that displays an ad over browser window and tries to disguise it as a part of a web page).

[whyagaindavid]

Then do not buy such hardware. Do your homework or search or ask xda before buying phone/tablet. Or just get nexus or see copperheadOS