Install crDroid 12 for Galaxy A21s

a21s

Back to download page

Flashing instructions


Pre-installation:

  • Must have Latest OneUI 4.1 before the install
  • Must have an unlocked bootloader
  • Recovery (from download page, recovery button)
  • Optional gapps (from download page, gapps button)
  • Odin3 Download

First time installation (clean flash):

  • Remove all Google accounts from your device to avoid FRP (Factory reset protection).
  • Backup Data if needed and plug your device into a computer.
  • Power off the phone, then enter Download Mode using Volume Down + Volume Up and enter Odin3.
  • Go to options and uncheck auto reboot.
  • In Odin3, select the AP slot and input the recovery file (Read the next step before installing).
  • After the flash is done, hold Volume Down + Power till screen goes black then Volume Up + Power until in recovery.
  • In recovery, click Apply Update, then Apply from ADB.
  • Press right click in your adb tools folder.
  • Then put this command on your PC and adapt as needed (grab the file with the mouse in the terminal) to install the crDroid rom:
adb sideload crdroid.zip
  • After it's done, do the same steps to install any additional packages (gapps).
  • In crDroid recovery, select Factory reset, then Format data/factory reset.
  • Then Reboot and enjoy.

Update installation:

  • Go to the system updater in the Settings app, and download the new update.
  • After the download is done, the update will be installed automatically.
  • Reboot.

NOTE: If after OTA, some additional packages you had installed (e.g Magisk) are not there anymore, reflash them in recovery with ADB.

Require support?

For support questions, check out forum or telegram links found on our support page