<h3 id="heading-if-you-are-facing-this-error-while-install-or-run-your-react-native-application-on-your-mobile-phone">If you are facing this error while install or run your React Native application on your mobile phone.</h3>
<img src="https://cdn.hashnode.com/res/hashnode/image/upload/v1735124726182/a3ee521a-83b9-40fa-81b1-1c4e17ef7f55.png" alt class="image--center mx-auto" />
Than you just have to Turn on Developer option on your mobile and allow USB debugging ✔️ , and allow to Install via USB ✔️
<img src="https://cdn.hashnode.com/res/hashnode/image/upload/v1735124952029/63aaeab9-a8d8-4812-bb74-8c04e8299c5e.jpeg" alt class="image--center mx-auto" />
And make sure your mobile device is connect with your Laptop/PC via data cable.
Than just run
<pre><code class="lang-bash">npm start
</code></pre>
<img src="https://cdn.hashnode.com/res/hashnode/image/upload/v1735125164484/799590bd-31ab-4d40-bbe7-4d879577c966.png" alt class="image--center mx-auto" />
Click on - a

### If you are facing this error while install or run your React Native application on your mobile phone.

![](https://cdn.hashnode.com/res/hashnode/image/upload/v1735124726182/a3ee521a-83b9-40fa-81b1-1c4e17ef7f55.png align="center")

Than you just have to Turn on Developer option on your mobile and allow USB debugging ✔️ , and allow to Install via USB ✔️

![](https://cdn.hashnode.com/res/hashnode/image/upload/v1735124952029/63aaeab9-a8d8-4812-bb74-8c04e8299c5e.jpeg align="center")

And make sure your mobile device is connect with your Laptop/PC via data cable.

Than just run

```bash
npm start
```

![](https://cdn.hashnode.com/res/hashnode/image/upload/v1735125164484/799590bd-31ab-4d40-bbe7-4d879577c966.png align="center")

Click on - a

Troubleshoot React Native setup errors on Android by enabling Developer options, USB debugging, and ensuring proper device connection

Troubleshooting Android Errors During React Native Setup and Launch

If you are facing this error while install or run your React Native application on your mobile phone.