##Upgrading or Flashing Custom Roms
###Dirty Flash
-
When you flash over a new version of a rom over an old version.
-
E.g. Cyanogenmod Nightly -> Cyanogenmod Stable / Newer Nightly
1: Nandroid backup 2: Format /system (in Mounts and Storage)
3: Format /cache (in mounts and storage)