Re-flashing

Preparation

  • adb reboot recovery reboots into recovery (TWRP)
  • Wipe everything (Dalvik / ART Cache, cache, system, Data, Internal Storage)
  • adb push lineage-18.0-20201020-UNOFFICIAL-i9300.zip /sdcard/ copies zip with ROM to /sdcard/

Flashing

  • Flash the new zip: took about two minutes
  • First reboot: took 4 minutes
  • about 1 minute to get to the encryption password
  • and about 3 minutes to get into the OS (1st time)