> 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![](/files/VBStQpZiPk32N2sisk9d):

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

<figure><img src="/files/LQgIy5KEqKdjTkJ4WQO9" alt=""><figcaption></figcaption></figure>

You can click on "Wifi-Calling".

<figure><img src="/files/nX0mTMD7cIGMNzMzyBT3" alt=""><figcaption></figcaption></figure>

You can fill out your Wifi-calling address:

<figure><img src="/files/osjUV5hj66i6XyAkEMcD" alt=""><figcaption></figcaption></figure>

When completed, you will see this notification:

<figure><img src="/files/2hyHiXJs8ZsaBYgsHJeF" 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.

![](/files/fu45R2PSymHK2KAF00B1)

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 %}