##Upgrading or Flashing Custom Roms
###Dirty Flash
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When you flash over a new version of a rom over an old version.
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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) 4: Format Dalvik Cache (In Advanced) 5: Install zip (1. ROM.zip then 2. Gapps) 6: Fix Permissions (In advanced) 7: Reboot
###Clean Flash:
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Starting over / Starting from a clean slate.
1: Nandroid backup 2: Wipe data/factory reset 3: Wipe cache 4. Format Dalvik Cache (In Advanced) 5: Install zip (1. ROM.zip then 2. Gapps) 6: Fix Permissions (In advanced) 7: Reboot