International calls and data roaming fix (T- Mobile). Steps to follow:
Make sure your Wi-Fi is turned off
Open dial pad and dial #766# and hit send like you're making a call
Once it shows that it took the code then go into your settings and find Wi-Fi calling and make sure it shows as "cellular network preferred"
Go back into your settings and find your Mobile Network connection information and make sure that "Mobile Data" and "Data Roaming" are both checked.
Click on "Network Operators" and then click "Search Now" (hit okay to any pop-ups that say the network will be disconnected) - choose an available network and you should be good to make calls and search the internet!
Don't forget to turn your Wi-Fi back on to use Wi-Fi calling if you have that feature.
Hope this helps!
Tags: International calls and data roaming fix (T- Mobile), T Mobile data roaming, International roaming, issues with T Mobile, Making an International call, T Mobile