20231015GT

Version 20231015 based on Android 12 for ZXW devices running on GT6 (SD665/SM6125) platform, built on Saturday, July 15, 2023.

This is the first firmware we’re aware of, so here are differences between this ZXW firmware and older KSW A12 Ksw-S-M600-OS_v1.5.4NEXAI-ota:

Built in release mode (release-keys) that prevents tampering
Missing KSW apps
- in system/app: APKInstaller, KswAirConditioner, KswPLauncher, KswPMusic, KSWPVideo, WitsLogcat, kswEq
- in system/PreInstall: AutoMap, CarCare, CarplayZlink, DAB-Z, KugouAuto, TXZOverSeaAdapter, TingCar3.0, WitsScreencast, qqmusiccar, sogouInput
- in system/priv-app: AppManager, Ecar_SOS, FactoryKit, KswBt, TXZAIPal, TXZCore, TXZOta, TXZWeather, WitsShell
New apps
- in system/app
  - CarLetter (com.carletter.car) app version 7.3.6.20230711
    - Developed by company “CarAuto”, looks like equivalent of Zlink:
      - Android Auto (wired and wireless)
      - Apple CarPlay (wired and wireless)
      - Apple AirPlay screen mirroring (wireless hotspot)
      - Carletter Cast (bluetooth and wireless hotspot)
      - DLNA screencasting (wireless hotspot, both Android/iOS)
      - CarLife (wired and wireless)
      - Huawei HiCar (bluetooth)
    - Automatic software updates when connected to the internet
    - Requires six digit activation code
    - Default hotspot is SSID carletter with password 12345678.
    - Weirdly has this CarLetter stuff, but device’s “Bluetooth manufacturer interface name” is set to zlink_5.
    - User interface configuration file etc/carletter.prop with the following interesting bits:
      - The “customer platform” is set to ZXW-6125-02
      - There’s an “activation type” that looks like base64 encoded string, but ends up more like a binary code: ACTIVATION_TYPE=P+Auul9NJekHowQfXS/g0jVjYDLUpSzGloLvkMH7P/bWoXPM5i02mxeXqGFWmMPYimUIrof6Rddo5IUaRLylOfevDUbyTd00czMf8KToP7rQTvLiuSZ+KQ1ZJPRWYBDk83X6WIejbomMUC0n836xoCZyScoMSrlA7zfSgGrJ0io=
      - There are various settings for the “internet menu options”:
        
        ALL - Full functionality (Apple CarPlay, Android Auto, Huawei HiCar, Carlife)
        
        OVERSEAS_VERSION - Overseas version (Apple CarPlay, Android Auto) set in this firmware file
        
        DOMESTIC_EDITION - Domestic version (Apple CarPlay, Android Auto, Huawei HiCar)
        
        WITH_LANGUAGE - Depending on language setting, where Chinese would trigger domestic edition and all other languages would trigger overseas version
        
        CARPLAY_CARLIFE - Apple CarPlay, Carlife
      - There is a setting for either landscape or portrait screen mode
  - ExtShared (android.ext.shared) app version 1 that does absolutely nothing
- in system/priv-app:
  - Shell (com.android.shell) app
    - Presumably in place of KSW’s WitsShell app
    - User facing functionality seems to be just about bug reporting that can attach screenshots
  - StatementService (com.android.statementservice) app version 1.0
  - SysVarProvider (com.szchoiceway.providers.settings) app version 12
    - Basically a third party library, wrapper for SQLite database for other apps to store settings.
  - SystemUpdaterSample (com.example.android.systemupdatersample) app version 12
    - Looks like an update manager capable of downloading OTAs. Expects config.json or update.zip files, and switching slots (A/B) to boot the device from a new slot after a successful update.
  - zxw360 (com.fibocom.multicamera) app version 1.1.0.230529.1027
    - The app is called “360 panorama” and it seems like software to handle a 360 camera hardware. Requires activation code, supports 1080P, full-screen display, handling storage and formatting FAT32 SD cards, pre-allocating storage space, calibration, upgrading car models from USB flash disks, stuff like that.
- in system/product/app:
  - ApkInstall (com.szchoiceway.apkinstall) app version 1.0._20230706-11:22:23
    - “One click install” and “One click uninstall”
    - “Please put the apk files into the root directory of USB storage devices and instert the drive”
    - “Put the apk file to be copied in the apk_cn or apk_en directory of the U disk and put the multimedia files in the media directory of the U disk.”
  - BTSuite (com.szchoiceway.btsuite) app version 1.0-2023-07-12:09-58
    - Similar purpose as KSW’s KswBt app
    - Called “Bluetooth phone” with “BT music”, “Call record”, “Contacts”, “Dial Pad”, “BT Pair”
    - UI supports ad2324, benz, bwmid8, dz and landrover
  - CustomerUI (com.szchoiceway.customerui) app version 1.0
    - Seems like the main launcher, like KSWPLauncher
    - “APK installer”, “Browser”, “Bluetooth phone”, “Touch to connect bluetooth”, “Contacts”, “Dashboard”, “File manager”, “Multimedia”, “Navigation”, “Vehicle information”, “Background settings”, “Weather”
    - References to AVINUSA.com
  - Equalizer (com.szchoiceway.equalizer) app version 1.0
  - EventCenter (com.szchoiceway.eventcenter) app version 1.0-2023-07-14:20-42
  - FatSet (com.szchoiceway.fatset) app version 1.0
    - Contains labels equivalent of KSW factory settings screen (music app selection, mic gain, aux switching, distance unit selection, original/external bluetooth, etc.)
  - KSWAux (com.szchoiceway.ksw_aux) app version 1.0
  - KSWCmmb (com.szchoiceway.ksw_cmmb) app version 1.0
  - KSWDvd (com.szchoiceway.ksw_dvd) app version 1.0
  - KSWDvr (com.szchoiceway.ksw_dvr) app version 1.0
  - KSWFCamera (com.szchoiceway.ksw_fc) app version 1.0
  - Launcher3QuickStep_ksw (com.android.launcher3) app version 1.0 with crash handler and /mnt/usb_storage/log/ location
  - LogCapture (com.szchoiceway.logcapture) app version 1.0
  - MusicPlayer (com.szchoiceway.musicplayer) app version 1.0-2023-06-25:16-12 with SDCard/USB1/USB2 handling, Bluetooth calling, searching for music and video
  - NaviSettings (com.szchoiceway.settings) app version 1.0
    - Contains labels equivalent of KSW factory settings screen (music app selection, mic gain, aux switching, distance unit selection, original/external bluetooth, etc.)
    - Ability to collect MCU CANBUS logs (CAN1/CAN2) and saving them to a USB drive
    - Ability to open a PDF file with user manual
  - Navigation (com.szchoiceway.navigation) app version 1.0
    - References to various UIs for vendors: ANCHANGXING, AOCHEKAI, BORUIZENGHENG, CHEKU, HANGFEI, HANGRUN, HUANGRUN, KEISAWEI, KESHANG, MAIRUIWEI, MAISILUO, NORMAL, PUSIRUI, XINGSHUO, ZHONGHANGTIANYI
  - TXZWeatherApp (com.txznet.weather) app version 1.0.5_5
  - TestTools (com.szchoiceway.testtools) app version 230322-09:58:34
    - Most likely an internal test app to run at a warehouse for QA
    - Checking operation of audio, Bluetooth, GPS, HDMI, IMEI, MFI, microphone, SIM, storage (USB/SD), version, Wi-Fi
  - UpdateMCU (com.szchoiceway.updatemcu) app version 1.0
    - Labels referencing “BT upgrade file” /data/local/bt_update.bin
    - Labels referencing “MCU upgrade file” /data/local/mcu_udpate_auto.bin with various possible source locations:
```
gpscard_dir = "/storage/external_sd0/";
mediacard_dir = "/storage/external_sd/";
card_dir = "/storage/external_sd/";
usb_dir = "/storage/usb_storage0/";
usb_dir1 = "/storage/usb_storage1/";
usb_dir2 = "/storage/usb_storage2/";
usb_dir3 = "/storage/usb_storage3/";
flash_dir = "/storage/sdcard0/";
```
  - VideoPlayer (com.szchoiceway.videoplayer) app version 1.0-2023-06-25:16-13
  - ecar (com.ecar.assistantnew) app version 4.4.11.A.011.2046
  - zxwmedia (com.szchoiceway.zxwmedia) app version 1.0-2023-03-08:17-40
There’s a product/app/CarType.xml with the same style configuration like KSW’s factory_config.xml file, although it only has a handful of sections in comparison to what we know. It appears that it’s the default/backup configuration that can be overridden with OEM/zxw_factory_config.xml:
- SupportUIList with just UI_EVO_ID7 (ID 16)
- SupportNaviAppList
- SupportDvrAppList
- CarDisplayParam
- CANBusProtocol
Ability to load files from USB disk:
- OEM/logo.bmp
- OEM/bootanimiation.zip
- OEM/zxw_factory_config.xml
They seem to have additional label to perhaps replace our infamous “Phone is starting” text <string name="android_start_title_zxw">Android is starting…</string>
NTP server is set to ntp2.aliyun.com (Alibaba Cloud) rather than time.android.com
There is no “MCU Restart” option
Status bar on KSW seems to have extra four labels for icons that presumably ZXW does not display: Bluetooth, HD/SD (screen definition) and USB.
You can change USB charging current, presumably for devices connected to this head unit. By default, it’s 1000mA, and it supports values of 0,500,1000,1500,2100,2400,3000.
Seems to be using xs9922b0 which appears to be a CHIPUP XS9922B video decoding chip supporting 1080p@30fps.
Customer name is set to 科赛威 (Kosavi)

File signatures

md5: 6368565f11705bac39ae29d9111c1d28
sha1: 2978960dc8ad9d62ae19b875d9278d06300df4c2
sha256: 2aaf4c0a5ea800c693c4b5cb1fae50f04fd81e8902458f5150a1f55fe07a1839

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Android Head Units

20231015GT_KSW