> For the complete documentation index, see [llms.txt](https://doc.1psim.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.1psim.com/english/enable-wificalling.md).

# Enable Wificalling

If you want to use Wificalling on T-mobile SIM, you will need to follow the following steps:

## Step 1 - Enable Wificalling at your 1PSIM Account

After you login to 1psim.com, you can go to SIM lising.  Then You will see your list of SIMs![](https://3602547749-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi64ngIBKWL8X8kbyuKaY%2Fuploads%2FRhlKqqdrunvyD2NmT8Ek%2Fimage.png?alt=media\&token=20d3b6b7-78e5-47f1-b3cf-5c894a8b3877):

At the far right of the page, you will see all the action buttons:

<figure><img src="https://3602547749-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi64ngIBKWL8X8kbyuKaY%2Fuploads%2FxiswXgkavWQFjXwbuxVQ%2Fimage.png?alt=media&amp;token=d8735e05-75bf-47fc-8a81-3644daddc15b" alt=""><figcaption></figcaption></figure>

You can click on "Wifi-Calling".

<figure><img src="https://3602547749-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi64ngIBKWL8X8kbyuKaY%2Fuploads%2FGXEfYqobIobLaVeyg07q%2Fimage.png?alt=media&amp;token=d4841e05-4802-4b10-9c15-cfaf9c503e19" alt=""><figcaption></figcaption></figure>

You can fill out your Wifi-calling address:

<figure><img src="https://3602547749-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi64ngIBKWL8X8kbyuKaY%2Fuploads%2FBo9C224qNVrc5lYWfCcn%2Fimage.png?alt=media&amp;token=a640d714-7eb2-4211-9295-c3bbb8ee233f" alt=""><figcaption></figcaption></figure>

When completed, you will see this notification:

<figure><img src="https://3602547749-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi64ngIBKWL8X8kbyuKaY%2Fuploads%2FRGph01z1FYfucKfhhQeF%2Fimage.png?alt=media&amp;token=72ff6abc-c1bf-47d3-a212-c256868a4935" alt=""><figcaption></figcaption></figure>

## Step 2 - Turn on Wifi-calling at your device

In your device, if you see Wi-Fi Calling ( or VoWIFI ) shown as OFF, please turn it ON.

![](https://3602547749-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi64ngIBKWL8X8kbyuKaY%2Fuploads%2F1bhSEVdyhPspIYJPdNqp%2Fimage.png?alt=media\&token=c0ca3404-2dcf-4fec-96f1-0388dd27a53f)

After Wifi-Calling is turned on, you can start making call or sending SMS to US numbers.

{% hint style="info" %}
Wifi-calling only allow you to send Call and SMS to US phone numbers.
{% endhint %}