1.Miao has several fonts, one is the system file Miao.apk, and the other is some software file programs. As a system file, you will need some programs, so it is best not to delete it. If you want to delete it, you'd better back it up before deleting it.

2.NV refers to a kind of data information, including user area data: "phone book, short message, serial number, RF parameters (signals), etc." Generally, it is the user area data, that is, the phone equipment number and RF parameters of chip information storage. Once the NV file is lost, it may be impossible to make a phone call or the serial number is inconsistent, resulting in cell phone failure, non-original software and other failures. If you want to delete, you can back up NV first to avoid some formatting failures such as no signal.