Add a feature where you can select what to wipe, e.g. you could choose to have it wipe only your SMS messages, so the phone still looks lived-in and not factory

Add a feature where you can select what to wipe, e.g. you could choose to have it wipe only your SMS messages, so the phone still looks lived-in and not factory-fresh and make it impossible to tell whether the normal unlock code or wipe code was used.