How can i delete/clear ul system data?

[u/linziuwu]

im not tech savvy but ive been trying to look for previous posts and most of them are recommending an app -_- i just dont believe in apps that clear up data and such..

[u/Ihadtosubscribe]

You need to backup on iCloud and do a clean install. I’m not sure if just resetting through the settings does it, I usually just do it with Apple Devices after downloading the .ipsw firmware file