# Custom-Build Firmware

Rather than using the standard firmware, custom router firmware is built with your requests in mind.

The basic custom-build services on the 4G/5G SIM card firmware will be built from the standard firmware but optimized for your network environment and use case by integrating carrier APN parameters, wireless WiFi hotspots, specific firewall rules, and necessary features and plugins.

Please get in touch with us to consult whether your requirement is met with a custom-build firmware. Generally speaking, the configurations you can modify on the web UI and SSH terminal from the standard firmware can be integrated into a custom firmware.

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## Backup Archive

Analyzing the current configuration and settings from the standard firmware is necessary to develop custom firmware for an existing router. This provides valuable insights and allows settings to be transferred to the new custom firmware.

After accessing the router admin, go to "**System > Backup / Flash Firmware**". \
Then, click the "<mark style="color:green;">**Generate Archive**</mark>" button on the "Backup" settings.<br>

<div align="left"><figure><img src="/files/W4xSanJvxSFtAJryFT0o" alt="" width="375"><figcaption></figcaption></figure></div>


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://how.router.works/dev/custom.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
