用syn3 updater可以下载固件。
更新内容如下
# Technical Information from FMods
Package Name: NU5T-14G381-AD
Epoch: 1689364279000
Major Version: 3.4
Build: 23188
Build Date: 2023-07-07
Package Date: 2023-07-14
Release Date: 2023-08-02
List of Changed files: https://pastebin.com/CDJJW9mN
Changes (based on diff):
* Updated several libs, bin, and ifs
* Fixed SLOGS compression and purge
Does JB works? WORKING (according to community members)

修改内容
List of changes (based on DIFF) in Sync 3 Build 3.4.23188 compared to previous versione 3.4.23088, by Fmods.net
M   Manifest.txt
M   NAV/Job2/libitypeproxy.lib
M   NAV/libNAV_TI_Log.so
M   NAV/libNAV_TI_Logging.so
M   Version.inf
M   apps/APP_SUM
M   apps/AppLinkBTiAPMgr
M   apps/AppLinkService
M   apps/AudioDriver
M   apps/AudioManufacturingUtilities
M   apps/AudioModeResrcServer
M   apps/EASimulator
M   apps/FM_DispatchAndRouting
M   apps/FM_DriverCoach
M   apps/FM_DriverID
M   apps/FM_FTCPRouter
M   apps/HMI_AL
M   apps/MM_BTAudioManager
M   apps/MM_DioCarLifeService
M   apps/MM_DioService
M   apps/MM_GalCarLifeService
M   apps/MM_GalService
M   apps/MM_GracenotesService
M   apps/MM_MediaService
M   apps/MM_ProjectionService
M   apps/MM_ZPlayerService
M   apps/NAV_ReadSDKVersion
M   apps/NAV_UBLOX_Connect
M   apps/NET_AAP_Service
M   apps/NET_BT_Service
M   apps/NET_EmergencyAssist
M   apps/NET_TCUMgr
M   apps/NET_WifiConnectionMgr
M   apps/NS_DiagSnapshot
M   apps/NS_EventCoun

一直都无法下载，不知道是否国外网站的问题