This procedure clears temporary files from your phone's operating system and cleans up any residual files from apps you have uninstalled, to help your phone run smoothly.
What will happen if I wipe cache partition?
Performing a wipe cache partition removes any temporary files that may be causing an issue with the device. All personal files and settings are not affected by this option. Ensure the device is powered off.
Does wipe cache partition delete everything?
If you wipe the cache, the system will rebuild those files the next time your phone needs them (just like with app cache). While we don't recommend clearing the system cache—especially regularly or for no reason—there are occasions where it can help.