Wi-Fi Calling FAQs

Created bytmo_joshua on Dec 16, 2013 8:36 AM. Last modified bytmo_michele_d on Nov 6, 2015 10:24 AM.

Version 16

Find answers to commonly asked questions aboutWi-Fi Calling.

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To use Wi-Fi calling, you'll need a supported T-Mobile Wi-Fi Calling-capable phone and Wi-Fi Internet access.

Go to the phone how tos for yourdevice and look for the Wi-Fi calling steps.

You may see this error if there is a problem. SeeError: 'Invalid SIM'.

When you dial 911 while using Wi-Fi calling, your location may not be automatically provided to the dispatcher.

For Simple Choice Plans, Wi-Fi calling uses monthly plan minutes for the following:
- Calls made from the US to US numbers
- Calls made from the US to international numbers (subject to international rates)
- Calls made from outside the US to US numbers (not charged roaming)
All incoming calls received over Wi-Fi Calling are $0.
Wi-Fi calls placed to countries other than the U.S. from outside the U.S. are subject to the following:
- If you have a Simple Choice rate plan:
  - Wi-Fi calls made from anySimple Global country to any other country are $0.20/min (same as cellular).
  - Wi-Fi calls made from non Simple Global countries to other countries are charged atWorld Class rates.
- If you do not have a Simple Choice rate plan, Wi-Fi calls made to other countries are charged atWorld Class Calling rates.
Keep in mind, you must disable data roaming when traveling internationally to avoid incurring data roaming charges.

All text messages (SMS) and picture messages (MMS) received over Wi-Fi are $0.
SMS/MMS sent to the U.S. over Wi-Fi from anywhere are $0.
Wi-Fi messages sent to countries other than the U.S. from outside the U.S. are subject to the following:
- $0 if the messages is sent while roaming in a Simple Global country
- $0.50 if the messages is sent while roaming in a non-Simple Global country

For Pay In Advance prepaid lines, calls made over Wi-Fi deduct from the plan bucket just like regular calls.

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