> For the complete documentation index, see [llms.txt](https://docs.monogoto.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.monogoto.io/getting-started/general-device-configurations/cellular-modems/smart-cash-register-configuration-to-use-cellular-sim-as-wifi-backup.md).

# Smart Cash Register Configuration to Use Cellular SIM as WiFi Backup

1\.       Press on **internet settings** in the tool bar.

![](/files/-Mf3_pvEe9WzSi7Lt-Qo)

2\.       Press and hold **Cellular** button for a few seconds.

![](/files/-Mf3a8rTIBVgAH5oZexu)

3\.       You should see **Go to Settings** button appear, please press on this button.

![](/files/-Mf3aEraO0bEW2QZqqz7)

4\.       When Cellular settings open, please press on **Advanced options**.

![](/files/-Mf3aYwpczq1CLtXlt8S)

5\.       Press on button **Add an APN**.

![](/files/-Mf3asE_CmDCvdw4T3Fd)

6\.       When the APN configuration window opens, please enter profile name and APN. Below you can see example showing the **go.mono** being used in a device.

<figure><img src="/files/C6aCmrqMp9CyzqEi6Fxv" alt=""><figcaption></figcaption></figure>

7\.       After entering APN and profile name, please scroll down and mark **Apply this profile**. This will set this new APN as a default APN in this device.

![](/files/-Mf3bcoA96x4AfGCM2NF)

8\.       To save our APN settings, please press on **Save** button.

![](/files/-Mf3bmya3SNQChLNiryA)

9\.       After saving APN, please enable data roaming, by selecting **Roam** under **Data roaming options**

![](/files/-Mf3dgm1IO7tZXAaOQZq)

10\.       Now to set this cellular data to be used when there are issues with WiFi, please select When Wi-Fi is poor under Use cellular instead of Wi-Fi.

![](/files/-Mf3dcDmDA4c-KRr_Xe7)

11\.       To apply the settings to the device, please click on **Cellular** to disable it and then again click on **Cellular** to enable it.

![](/files/-Mf3cgHuILcJucbP367F)