## **How to connect Android Auto to Android head unit? (Android Auto wireless connection / Zlink app setup / Smartphone integration guide)**

### Symptoms:

When attempting to connect your smartphone to an Android head unit via Android Auto (either wired via USB or wirelessly via Wi-Fi and Bluetooth), users may encounter connection failures, pairing errors, unrecognized device prompts, or issues with the built-in projection application (such as ZLink or AutoLink) failing to launch smartphone mirroring.

### Solution:

To successfully connect and configure Android Auto on your Android head unit, please follow these detailed integration steps:

* **Launch the Projection App**: Open the dedicated smartphone integration application on your head unit interface (commonly named **ZLink**, **AutoLink**, or **LinkApps**).

* **Establish Bluetooth Pairing**: Turn on Bluetooth on your smartphone, search for the head unit's Bluetooth name, and complete the pairing and contact synchronization process.

* **Enable Wi-Fi and Permissions**: For wireless Android Auto connection, ensure that Wi-Fi and Bluetooth remain enabled simultaneously on your phone, and grant all necessary permissions requested by the projection application.

* **Wired Connection Alternative**: If wireless pairing fails, plug your smartphone directly into the primary data-transmitting USB port of the head unit using an original high-quality USB cable.

* **Troubleshooting Connection Drops**: If wireless Android Auto experiences frequent disconnections or fails to start, check background data restrictions, update your phone's Android Auto app, clear cache, and verify that 5 GHz Wi-Fi band settings match the head unit requirements.

For a complete visual walkthrough of the connection procedure, follow the instructions in the video guide:

<https://www.youtube.com/watch?v=htDiAOdjtu0>

You can also review the technical article regarding common wireless connection failures and fixes at the official source: [Why Wireless Android Auto Fails - 5 Technical Fixes](https://smarty-trend.com/en/why-wireless-android-auto-fails-5-technical-fixes)

### Keywords:

Android Auto connection, wireless Android Auto setup, ZLink app configuration, smartphone integration, Android head unit phone mirroring, fix Android Auto failure, SMARTY Trend manual.