[OnePlus 7T Questions & Answers] seen_bawl:
hi i got the OS 12 air update today i install it into my phone but the phone was buggy freezing something not right, i try to downgrade back to OS 11 using local update, this option is no longer available so i did factory reset the phone stuck on fastboot

i try TOOL ALL IN ONE didnt work i try fastboot rom nothing works anymore any idea how to fix it

Do you want to wipe all the data ( Reccomended )[Y/N]?y

Erasing 'userdata' OKAY [ 0.125s]

F2FS-tools: mkfs.f2fs Ver: 1.12.0 (2018-11-12)

Info: Disable heap-based policy

Info: Debug level = 1

Info: Trim is disabled

Info: Set conf for android

Info: Segments per section = 1

Info: Sections per zone = 1

Info: sector size = 512

Info: total sectors = 203820072 (99521 MB)

Info: zone aligned segment0 blkaddr: 512

Info: add quota type = 0 => 4

Info: add quota type = 1 => 5

[f2fs_init_sit_area: 535] Filling sit area at offset 0x00600000

[f2fs_init_nat_area: 569] Filling nat area at offset 0x00e00000

[f2fs_write_root_inode:1147] Writing root inode (hot node), 1b800 0 200 at offset 0x00112640

[f2fs_write_default_quota:1223] Writing quota data, at offset 0001be01, 0001be02

[f2fs_write_qf_inode:1318] Writing quota inode (hot node), 1b800 0 200 at offset 0x00112641

[f2fs_write_default_quota:1223] Writing quota data, at offset 0001be03, 0001be04

[f2fs_write_qf_inode:1318] Writing quota inode (hot node), 1b800 0 200 at offset 0x00112642

[f2fs_update_nat_root:1372] Writing nat root, at offset 0x00000e00

[f2fs_add_default_dentry_root:1567] Writing default dentry root, at offset 0x0001be00

Info: Overprovision ratio = 0.640%

Info: Overprovision segments = 635 (GC reserved = 320)

[f2fs_write_check_point_pack: 713] Writing main segments, cp at offset 0x00000200

[f2fs_write_check_point_pack: 850] Writing Segment summary for HOT/WARM/COLD_DATA, at offset 0x00000201

[f2fs_write_check_point_pack: 877] Writing Segment summary for HOT_NODE, at offset 0x00000202

[f2fs_write_check_point_pack: 889] Writing Segment summary for WARM_NODE, at offset 0x00000203

[f2fs_write_check_point_pack: 900] Writing Segment summary for COLD_NODE, at offset 0x00000204

[f2fs_write_check_point_pack: 908] Writing cp page2, at offset 0x00000205

[f2fs_write_check_point_pack: 928] Writing NAT bits pages, at offset 0x000003fe

[f2fs_write_check_point_pack: 949] Writing cp page 1 of checkpoint pack 2, at offset 0x00000400

[f2fs_write_check_point_pack: 968] Writing cp page 2 of checkpoint pack 2, at offset 0x00000405

[f2fs_write_super_block:1001] Writing super block, at offset 0x00000000

Info: format successful

Sending 'userdata' (85 KB) OKAY [ 0.011s]

Writing 'userdata' OKAY [ 0.004s]

Erasing 'metadata' OKAY [ 0.007s]

Erase successful, but not automatically formatting.

File system type raw not supported.

Finished. Total time: 7.984s

Sending 'boot_b' (98304 KB) OKAY [ 2.218s]

Writing 'boot_b' OKAY [ 0.367s]

Finished. Total time: 2.669s

Sending 'dtbo' (16384 KB) OKAY [ 0.371s]

Writing 'dtbo' OKAY [ 0.067s]

Finished. Total time: 0.471s

Sending 'modem_b' (165396 KB) OKAY [ 3.737s]

Writing 'modem_b' OKAY [ 0.901s]

Finished. Total time: 4.785s

Sending 'reserve' (250164 KB) OKAY [ 5.607s]

Writing 'reserve' FAILED (remote: '(reserve_b) No such partition')

fastboot: error: Command failed

Sending 'recovery' (98304 KB) OKAY [ 2.200s]

Writing 'recovery' OKAY [ 0.442s]

Finished. Total time: 2.726s

Sending 'vbmeta' (8 KB) OKAY [ 0.013s]

Writing 'vbmeta' OKAY [ 0.003s]

Finished. Total time: 0.035s

Sending 'vbmeta_system' (4 KB) OKAY [ 0.009s]

Writing 'vbmeta_system' OKAY [ 0.004s]

Finished. Total time: 0.031s

Rebooting into fastboot OKAY [ 0.003s]

< waiting for any device >

fastboot: error: Failed to boot into userspace fastboot; one or more components might be unbootable.

Sending 'abl' (1164 KB) OKAY [ 0.039s]

Writing 'abl' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'aop' (200 KB) OKAY [ 0.019s]

Writing 'aop' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'bluetooth' (828 KB) OKAY [ 0.028s]

Writing 'bluetooth' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'cmnlib' (384 KB) OKAY [ 0.017s]

Writing 'cmnlib' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'cmnlib64' (500 KB) OKAY [ 0.018s]

Writing 'cmnlib64' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'devcfg' (52 KB) OKAY [ 0.009s]

Writing 'devcfg' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'dsp' (65536 KB) OKAY [ 1.468s]

Writing 'dsp' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'hyp' (480 KB) OKAY [ 0.024s]

Writing 'hyp' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'imagefv' (20 KB) OKAY [ 0.007s]

Writing 'imagefv' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'keymaster' (248 KB) OKAY [ 0.020s]

Writing 'keymaster' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'LOGO' (6540 KB) OKAY [ 0.161s]

Writing 'LOGO' OKAY [ 0.044s]

Finished. Total time: 0.232s

Sending 'multiimgoem' (16 KB) OKAY [ 0.015s]

Writing 'multiimgoem' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'odm' (912 KB) OKAY [ 0.028s]

Writing 'odm' FAILED (remote: '(odm_b) No such partition')

fastboot: error: Command failed

Sending 'oem_stanvbk' (2480 KB) OKAY [ 0.065s]

Writing 'oem_stanvbk' OKAY [ 0.017s]

Finished. Total time: 0.105s

Sending 'opproduct' (586912 KB) OKAY [ 13.173s]

Writing 'opproduct' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'qupfw' (72 KB) OKAY [ 0.016s]

Writing 'qupfw' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'storsec' (24 KB) OKAY [ 0.009s]

Writing 'storsec' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'tz' (3092 KB) OKAY [ 0.078s]

Writing 'tz' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'uefisecapp' (124 KB) OKAY [ 0.017s]

Writing 'uefisecapp' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'xbl' (3120 KB) OKAY [ 0.075s]

Writing 'xbl' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Sending 'xbl_config' (124 KB) OKAY [ 0.013s]

Writing 'xbl_config' FAILED (remote: 'Flashing is not allowed for Critical Partitions.

')

fastboot: error: Command failed

Invalid sparse file format at header magic

Sending sparse 'system' 1/3 (784708 KB) OKAY [ 17.615s]

Writing 'system' FAILED (remote: 'Partition not found')

fastboot: error: Command failed

Invalid sparse file format at header magic

Sending sparse 'vendor' 1/2 (785569 KB)