How-to guides

Task guides with exact menu paths and commands. Anything labelled Advanced or Brick risk has rollback steps; read them before you start.

Enable ADB on an AI Box: USB, Wi-Fi and Ottocast Port 65535Advanced
Turn on ADB on a Carlinkit TBox (code 142618 or wireless debugging) or an Ottocast Picasou (port 65535 / 29528), connect, and switch it off again safely.
Carlinkit TBox Ultra, Carlinkit TBox Ultra 2, Carlinkit TBox Ultra 3 +8
Enable Multitouch Pinch-Zoom on TBox Ultra, Plus and AmbientBrick risk
No pinch-zoom on your TBox in Android Auto? Check your firmware, then add one build.prop line over ADB without root (Ultra, Plus) or patch the Ambient.
Carlinkit TBox Ultra, Carlinkit TBox Ultra 2, Carlinkit TBox Ultra 3 +4
Recover a Bricked TBox Ultra With QFIL (EDL, Firehose, UFS)Brick risk
TBox Ultra won't boot? Flash Carlinkit's official recovery package with QFIL in EDL mode: Flat build, SM6350 firehose, UFS. Plus fixes for Sahara errors.
Carlinkit TBox Ultra, Carlinkit TBox Ultra 2, Carlinkit TBox Ultra 3 +4
Root a Carlinkit TBox With Magisk via QFILBrick risk
Root a Carlinkit TBox Ultra or Ambient: back up boot_a/boot_b (init_boot on Ambient) with QFIL, patch in Magisk, write back, and how to undo it fully.
Carlinkit TBox Ultra, Carlinkit TBox Ultra 2, Carlinkit TBox Ultra 3 +4
Set Up Your AI Box at Home With Android's Desktop Head UnitAdvanced
Set up your AI box on a PC instead of in the car: Google's Desktop Head Unit acts as an Android Auto screen. Install, drivers, USB mode, TBox Ultra fixes.
Carlinkit TBox Ultra, Carlinkit TBox Ultra 2, Carlinkit TBox Ultra 3 +1
Update TBox Firmware Locally With FOTA and a microSD CardAdvanced
Local firmware update for Carlinkit TBox Plus, Ambient, UHD and Ultra with the FOTA app and a FAT32 microSD card, step by step, plus fixes when it fails.
Carlinkit TBox Plus, Carlinkit TBox Ambient, Carlinkit TBox UHD +4