If the app was accidentally deleted or lost after a system update, it can be restored: Restore via Factory Settings
If your new Android head unit is stuck on a "Click to Activate" screen for CarPlay or Android Auto, you likely need the Zhijian Activation process to register your device's hardware with the ZLINK or TLink5 software. zhijian activation app apk
: Launch the ZLINK, TLink, or zPlus app on your head unit. If the app was accidentally deleted or lost