# ====================================================================
# SECTION 1: FASTBOOT NORMAL (Black Bootloader Screen)
# ====================================================================

# 1. Boot the device into the standard bootloader mode
adb reboot bootloader

# 2. Safety check: Force and ensure you target your active slot (e.g., Slot A)
fastboot --set-active=a

# 3. Flash core kernel, vendor configurations, and device tree blobs (Sourced from cupidr releases)
fastboot flash boot /path/to/boot.img
fastboot flash vendor_boot /path/to/vendor_boot.img
fastboot flash dtbo /path/to/dtbo.img

# 4. Transition to the userspace partition manager screen (Fastboot d)
fastboot reboot fastboot


# ====================================================================
# SECTION 2: FASTBOOT D (Recovery-like Userspace Screen)
# ====================================================================

# 5. Wipe the old ROM's partition size layout footprint to completely clear the space
fastboot delete-logical-partition system_a

# 6. Initialize an elastic container (Setting size to 0 allows automatic size expansion)
fastboot create-logical-partition system_a 0

# 7. Flash the new GSI system image payload directly into the newly created container
fastboot flash system_a /path/to/your/GSI-image.img

# 8. Disable Android Verified Boot (AVB) flags to prevent verification loops (Crucial Step!)
fastboot flash vbmeta --disable-verity --disable-verification /path/to/vbmeta.img

# 9. Reboot the phone straight into standard stock/custom Recovery for the final wipe
fastboot reboot recovery


# ====================================================================
# SECTION 3: FINAL STEP (On the Physical Device Screen)
# ====================================================================
# Once the phone automatically finishes rebooting into the Recovery Mode menu:
#
# 1. Use the physical hardware volume keys to navigate and press Power to select:
#    --> "Factory Reset" / "Format Data"
#
# 2. Confirm the structural wipe execution to entirely purge old residual user data.
#
# 3. Once the format operation completes successfully, select:
#    --> "Reboot System Now"

# Note: If you manually run `fastboot erase system_a` instead of deleting/re-creating 
# the partition, verify beforehand that the new GSI image size fits the old block allocation.