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:

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

You can click on "Wifi-Calling".

You can fill out your Wifi-calling address:

When completed, you will see this notification:

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.

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