Comme tu le vois @piero, je suis complètement perdu.
Et je remercie pour ta patience.
J’essaie simplement de suivre le tuto que tu m’as donné :
Mais je ne sais plus où je dois commencer !
Je veux bien flasher le boot modifié (magisk_patched-25200_mxkLf.img) sur /BOOT mais je ne connais pas la commande heimdall à utiliser pour faire ça 
J’ai trouvé le lien suivant qui pourrait m’aider, mais je ne suis pas certain !?
https://papy-tux.legtux.org/doc1257/index.html#mozTocId407196
Pour info, j’ai listé les différentes partitions (au nombre de 41 tout de même!) :
Celle qui m’intéresse BOOT, doit être la #23 je pense.
$ sudo heimdall print-pit
Heimdall v1.4.2
Copyright (c) 2010-2017 Benjamin Dobell, Glass Echidna
http://www.glassechidna.com.au/
This software is provided free of charge. Copying and redistribution is
encouraged.
If you appreciate this software and you would like to support future
development please consider donating:
http://www.glassechidna.com.au/donate/
Initialising connection...
Detecting device...
Claiming interface...
Setting up interface...
Initialising protocol...
Protocol initialisation successful.
Beginning session...
Some devices may take up to 2 minutes to respond.
Please be patient!
Session begun.
Downloading device's PIT file...
PIT file download successful.
Entry Count: 41
Unknown 1: 1598902083
Unknown 2: 844251476
Unknown 3: 21324
Unknown 4: 14665
Unknown 5: 12856
Unknown 6: 48
Unknown 7: 5
Unknown 8: 0
--- Entry #0 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 80
Attributes: 2 (STL Read-Only)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 0
Partition Block Count: 1024
File Offset (Obsolete): 1
File Size (Obsolete): 0
Partition Name: BOOTLOADER
Flash Filename: sboot.bin
FOTA Filename:
--- Entry #1 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 100
Attributes: 2 (STL Read-Only)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 109
Partition Block Count: 20
File Offset (Obsolete): 1
File Size (Obsolete): 0
Partition Name: ECT
Flash Filename: ect.bin
FOTA Filename:
--- Entry #2 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 101
Attributes: 2 (STL Read-Only)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 129
Partition Block Count: 35
File Offset (Obsolete): 1
File Size (Obsolete): 0
Partition Name: ACPM
Flash Filename: acpm.bin
FOTA Filename:
--- Entry #3 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 102
Attributes: 2 (STL Read-Only)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 0
Partition Block Count: 0
File Offset (Obsolete): 1
File Size (Obsolete): 0
Partition Name: UL_KEYS
Flash Filename: ul_key.bin
FOTA Filename:
--- Entry #4 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 90
Attributes: 2 (STL Read-Only)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 0
Partition Block Count: 768
File Offset (Obsolete): 2
File Size (Obsolete): 0
Partition Name: BOOTLOADER2
Flash Filename: -
FOTA Filename:
--- Entry #5 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 92
Attributes: 2 (STL Read-Only)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 768
Partition Block Count: 256
File Offset (Obsolete): 2
File Size (Obsolete): 0
Partition Name: DDI
Flash Filename: -
FOTA Filename:
--- Entry #6 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 91
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 0
Partition Block Count: 1792
File Offset (Obsolete): 4
File Size (Obsolete): 0
Partition Name: CM
Flash Filename: cm.bin
FOTA Filename:
--- Entry #7 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 1
Attributes: 5 (Read/Write)
Update Attributes: 5 (FOTA)
Partition Block Size/Offset: 6
Partition Block Count: 1536
File Offset (Obsolete): 3
File Size (Obsolete): 0
Partition Name: CPEFS
Flash Filename:
FOTA Filename:
--- Entry #8 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 70
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 6
Partition Block Count: 2
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: PIT
Flash Filename: -
FOTA Filename:
--- Entry #9 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 71
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 8
Partition Block Count: 256
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: MD5HDR
Flash Filename: md5.img
FOTA Filename:
--- Entry #10 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 1
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 1024
Partition Block Count: 1152
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: BOTA0
Flash Filename: -
FOTA Filename:
--- Entry #11 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 2
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 2176
Partition Block Count: 1920
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: BOTA1
Flash Filename: -
FOTA Filename:
--- Entry #12 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 3
Attributes: 5 (Read/Write)
Update Attributes: 5 (FOTA)
Partition Block Size/Offset: 4096
Partition Block Count: 5120
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: EFS
Flash Filename: efs.img
FOTA Filename:
--- Entry #13 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 4
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 9216
Partition Block Count: 2048
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: PARAM
Flash Filename: param.bin
FOTA Filename:
--- Entry #14 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 5
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 11264
Partition Block Count: 2048
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: UP_PARAM
Flash Filename: up_param.bin
FOTA Filename:
--- Entry #15 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 6
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 13312
Partition Block Count: 128
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: KEYSTORAGE
Flash Filename: keystorage.bin
FOTA Filename:
--- Entry #16 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 7
Attributes: 5 (Read/Write)
Update Attributes: 5 (FOTA)
Partition Block Size/Offset: 13440
Partition Block Count: 5120
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: SEC_EFS
Flash Filename: sec_efs.img
FOTA Filename:
--- Entry #17 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 8
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 18560
Partition Block Count: 2048
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: BOTA2
Flash Filename: -
FOTA Filename:
--- Entry #18 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 9
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 20608
Partition Block Count: 1024
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: STEADY
Flash Filename: steady.bin
FOTA Filename:
--- Entry #19 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 10
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 21632
Partition Block Count: 512
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: UH
Flash Filename: uh.bin
FOTA Filename:
--- Entry #20 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 11
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 22144
Partition Block Count: 1024
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: UHCFG
Flash Filename: uhuh.bin
FOTA Filename:
--- Entry #21 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 12
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 23168
Partition Block Count: 2048
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: DTB
Flash Filename: dt.img
FOTA Filename:
--- Entry #22 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 13
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 25216
Partition Block Count: 2048
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: DTBO
Flash Filename: dtbo.img
FOTA Filename:
--- Entry #23 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 14
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 27264
Partition Block Count: 14080
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: BOOT
Flash Filename: boot.img
FOTA Filename:
--- Entry #24 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 15
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 41344
Partition Block Count: 16512
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: RECOVERY
Flash Filename: recovery.img
FOTA Filename:
--- Entry #25 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 16
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 57856
Partition Block Count: 12800
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: RADIO
Flash Filename: modem.bin
FOTA Filename:
--- Entry #26 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 17
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 70656
Partition Block Count: 256
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: NAD_REFER
Flash Filename: nad_refer.bin
FOTA Filename:
--- Entry #27 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 18
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 70912
Partition Block Count: 128
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: PERSISTENT
Flash Filename:
FOTA Filename:
--- Entry #28 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 19
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 71040
Partition Block Count: 256
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: MISC
Flash Filename:
FOTA Filename:
--- Entry #29 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 20
Attributes: 5 (Read/Write)
Update Attributes: 5 (FOTA)
Partition Block Size/Offset: 71296
Partition Block Count: 4096
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: KEYREFUGE
Flash Filename:
FOTA Filename:
--- Entry #30 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 21
Attributes: 5 (Read/Write)
Update Attributes: 5 (FOTA)
Partition Block Size/Offset: 75392
Partition Block Count: 4096
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: KEYDATA
Flash Filename:
FOTA Filename:
--- Entry #31 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 22
Attributes: 5 (Read/Write)
Update Attributes: 5 (FOTA)
Partition Block Size/Offset: 79488
Partition Block Count: 4096
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: DQMDBG
Flash Filename: dqmdbg.img
FOTA Filename:
--- Entry #32 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 23
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 83584
Partition Block Count: 16
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: VBMETA
Flash Filename: vbmeta.img
FOTA Filename:
--- Entry #33 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 24
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 83600
Partition Block Count: 368
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: BOTA3
Flash Filename:
FOTA Filename:
--- Entry #34 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 25
Attributes: 5 (Read/Write)
Update Attributes: 5 (FOTA)
Partition Block Size/Offset: 83968
Partition Block Count: 1459200
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: SYSTEM
Flash Filename: system.img
FOTA Filename:
--- Entry #35 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 26
Attributes: 5 (Read/Write)
Update Attributes: 5 (FOTA)
Partition Block Size/Offset: 1543168
Partition Block Count: 281600
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: VENDOR
Flash Filename: vendor.img
FOTA Filename:
--- Entry #36 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 27
Attributes: 5 (Read/Write)
Update Attributes: 5 (FOTA)
Partition Block Size/Offset: 1824768
Partition Block Count: 158720
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: PRODUCT
Flash Filename: product.img
FOTA Filename:
--- Entry #37 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 28
Attributes: 5 (Read/Write)
Update Attributes: 5 (FOTA)
Partition Block Size/Offset: 1983488
Partition Block Count: 153600
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: CACHE
Flash Filename: cache.img
FOTA Filename:
--- Entry #38 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 29
Attributes: 5 (Read/Write)
Update Attributes: 5 (FOTA)
Partition Block Size/Offset: 2137088
Partition Block Count: 12800
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: OMR
Flash Filename: omr.img
FOTA Filename:
--- Entry #39 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 30
Attributes: 5 (Read/Write)
Update Attributes: 1 (FOTA)
Partition Block Size/Offset: 2149888
Partition Block Count: 1280
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: CP_DEBUG
Flash Filename: modem_debug.bin
FOTA Filename:
--- Entry #40 ---
Binary Type: 0 (AP)
Device Type: 8 (Unknown)
Identifier: 31
Attributes: 5 (Read/Write)
Update Attributes: 5 (FOTA)
Partition Block Size/Offset: 2151168
Partition Block Count: 0
File Offset (Obsolete): 0
File Size (Obsolete): 0
Partition Name: USERDATA
Flash Filename: userdata.img
FOTA Filename: remained
Ending session...
Rebooting device...
Releasing device interface...
$
Je tenterais donc bien la commande suivante ?
$ sudo heimdall flash --BOOT magisk_patched-25200_mxkLf.img
