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Warning: The provided instructions are for crDroid 10 running on Galaxy A20 (a20). These will only work if you follow every section and step precisely.
Do not continue after something fails!
Do not continue after something fails!
Before you proceed, remove all Google accounts from your device to avoid "Factory reset protection" (FRP)!
Installation is only possible on a device with unlocked bootloader!
crDroid is provided as-is without warranty, and while we strive to ensure functionality, you install it at your own risk.
We are not responsible for any damage you made to your device. You have been warned!
We are not responsible for any damage you made to your device. You have been warned!
Flashing instructions
Prerequisites
- Your Samsung Galaxy A20
- This will NOT work on the A20e or A20s
- USB-C cable that can do data transfer
- A computer running Windows XP or later
- A MicroSD card that's at least 2GB
Do note the Japanese model of the Galaxy A20 (SCV46) is not supported, as it's actually a rebranded A20e.
Unlocking bootloader
This WILL factory reset your phone. Back up any data before continuing.
- Open Settings, and go to About phone -> Software information
- Tap "Build number" 7 times
- Go back, then select "Developer options"
- Enable "OEM unlocking", and press "Enable" on the warning (if the OEM unlocking option doesn't exist, your phone is not unlockable, likely it was purchased from a carrier like Verizon that restricts unlocking so you cannot continue).
- Turn off the phone
- Hold down volume down and volume up, and while doing this, plug the phone into your computer.
- Once the Warning screen appears, let go of all buttons.
- Hold down volume up until it says "Unlock bootloader?", then press volume up again.
Installing TWRP
You will have to install Odin and the Samsung USB drivers on a computer, which requires Windows XP or later.
- Turn the phone off
- Hold down volume down and volume up and plug the phone into your computer.
- When the Warning screen appears, let go of all buttons.
- Press volume up to enter download mode.
- Get twrp-3.7.0_9-0-a20.img.tar from https://twrp.me/samsung/samsunggalaxya20.html.
- Open Odin, and select the tar file you just downloaded for AP.
- Go to "Options", and verify "Re-Partition" is unchecked. Having it checked may result in a brick.
- Press "Start"
- When it finishes, your phone will reboot back into download mode.
- Download https://xdaforums.com/attachments/samsung_vbmeta-tar.5065877, select that file for AP, and press start again.
- When the phone reboots, hold down volume up and power until it boots into TWRP
Installing crDroid
- Download the latest crDroid build from download page
- Copy the file to a MicroSD card (ADB sideload doesn't work on some A20's for whatever reason, so it is recommended to use a MicroSD to install crDroid).
- Insert the SD card into your phone.
- In TWRP, press "Wipe", then "Advanced Wipe"
- Select "System", "Data", "Cache", and "Dalvik / ART Cache"
- Swipe to wipe
- Go back to TWRP's main menu
- Press "Install" in TWRP
- Go to "Select Storage", and pick "Micro SD Card"
- Select the crDroid zip
- Swipe to install, and wait several minutes for it to install
- If wanted, you can also install GApps.