Android security elevation, in plain terms
Plain-language overview.
Android keeps apps apart so one cannot read another's data. Privilege elevation is when software gains more rights than it was given, for example a normal app reaching system-level access. Old forum posts under this address discussed examples from the early 2010s.
This page does not describe how to do it. That information would help no reader here and could harm some.
Why it matters for privacy
Higher access means a program can see logs, messages and files that are normally protected. Phone logging is one reason people care: records kept by the system become more exposed if something can climb above its station.