Google, Samsung, Lenovo, and Nokia all support unlocking and flashing, including AOSP builds that are rootable. Yes, if you want to root your phones specific im

Google, Samsung, Lenovo, and Nokia all support unlocking and flashing, including AOSP builds that are rootable. Yes, if you want to root your phones specific image you'll need to tweak it to support root. TWRP isn't a jailbreak, nor is ADB or Lineage.