IPA: /nɒnˈæktɪveɪtɪd/
KK: /nɑnˈæktɪˌveɪtɪd/
Not turned on or made active.
The device remains nonactivated until you press the power button.
Nonactivated → It is formed from "non-" (meaning not) and "activated" (from Latin "activare", meaning to make active). The word "nonactivated" means not made active or not in a state of activity.
Think of 'not' ('non-') making something 'active' ('activare') — that's why nonactivated means something that is not active.