> For the complete documentation index, see [llms.txt](https://muonlinehungary.gitbook.io/guides/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://muonlinehungary.gitbook.io/guides/hungary-muonline-utmutato/errtel-combitanion.md).

# Errtel combitanion

<figure><img src="https://315871028-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fv3793pVT3eePfTsTDwh5%2Fuploads%2FW9uzXFYWyPOi1YWJVL7O%2Ferrtel%20upgrade.png?alt=media&amp;token=3104117e-b428-4a1c-9fcf-86fa8a933a09" alt=""><figcaption></figcaption></figure>