Advanced phone customization/Freeing up space

First off: You have already completed a significant portion of this article. By installing a custom ROM itself, you have saved a lot of space.

But you may wish to save more space by, for instance, deleting some of the system apps. How to do so depends on your ROM. Some may allow you to just uninstall normally, others may use unusual methods to achieve the same. You can also install apps from the Play Store which will do this for you.

Personal note: On Resurrection Remix, a dedicated option is available in the Customization section which allows you to delete any system app you want.

A word of caution though: