2. If the mobile phone wants to completely release the space, it still needs to be cleaned with PhoneClean to be completely removed.
Please download PhoneClean on your computer. PhoneClean is a tool to clean up junk software for iPhone/iPad, which needs the support of iTunes (Apple Sync Software). PhoneClean can clean application cache, cookies, offline data files, clean temporary files and reclaim free space. If you feel that the iPhone/iPad is getting slower and slower, you can try phone clean to clean up and release space. You can't clean it with mobile phone software. You have to use the computer to clean it thoroughly.