merci pour ta réponse,
même Flashtool ne reconnait pas le mobile donc impossible de flasher avec un autre firmware.
voila ce que j'ai avec Flashtool.
02/000/2019 03:00:10 - INFO - Flashtool Version 0.9.24.4 built on 01-02-2018 22:15:00
02/000/2019 03:00:10 - INFO - Searching for a web proxy
02/000/2019 03:00:11 - INFO - A proxy has been found. Using it as default
02/000/2019 03:00:11 - INFO - Syncing devices from github
02/000/2019 03:00:11 - INFO - Opening devices repository.
02/000/2019 03:00:11 - INFO - Scanning devices folder for changes.
02/000/2019 03:00:20 - INFO - Pulling changes from github.
02/000/2019 03:00:20 - INFO - Devices sync finished.
02/000/2019 03:00:22 - INFO - Loading devices database
02/000/2019 03:00:23 - INFO - Loaded 115 devices
02/000/2019 03:00:23 - INFO - Starting phone detection
02/000/2019 03:00:25 - INFO - Device disconnected
02/001/2019 03:01:02 - INFO - Device connected with USB debugging off
02/001/2019 03:01:02 - INFO - For 2011 devices line, be sure you are not in MTP mode
02/001/2019 03:01:05 - INFO - Selected Bundle for Sony Xperia E5(F3311). FW release : 37.0.A.2.108. Customization : Customized SA
02/001/2019 03:01:05 - INFO - Preparing files for flashing
02/001/2019 03:01:37 - INFO - Device disconnected
02/001/2019 03:01:54 - INFO - Please connect your device into flashmode.
02/004/2019 03:04:46 - INFO - Flash canceled
02/004/2019 03:04:47 - INFO - Device disconnected
02/004/2019 03:04:48 - INFO - Device connected with USB debugging off
02/004/2019 03:04:48 - INFO - For 2011 devices line, be sure you are not in MTP mode
02/005/2019 03:05:11 - INFO - Device disconnected