Jailbreak: custom software on stock firmware. This is not Android root.
How-to
How to
Software jailbreak per kindlemodding.org: WinterBreak2 (firmware 5.6.1.1-5.16.3, also 5.16.5; no registration needed) or WinterBreak (5.6.1.1-5.18.0.2; device must be registered). KOA2’s final firmware (5.16.2.x) is inside both ranges. Then install KUAL (Booklet via MRPI) and KOReader. No other jailbreak supports KOA2.
Follow the specialist sources linked on this page. If this path is a jailbreak, unlock, or flash, the specialist wiki is the how-to — we do not copy those steps here.
Notes
Firmware-dependent: check Settings > Device Info for the firmware version before choosing a method; do not update firmware first.
