Forced to enter additional digits after dialing an international call

I started having this issue a few months ago. All of a sudden T-Mobile have decided that the numbers I call every day, namely my mother in the UK, I suddenly need fraud protection from. I have been calling since Customer Service  for months and some haven't even heard of the problem. A supervisor by the name of Rachel went as far as telling me that it is not a T-mobile issue as she has never heard of it and it must be the carrier of the person I am calling. After calling several times and a front line agent told her about it she promised to call me back, I am still waiting! That was in July, we are now in October!

I spoke to another supervisor Brian, I still have to dial.

Today I  spoke to the rudest supervisor Omar who couldn't  be bothered to help and said he would have a manager call me back within 4 hours. That was almost 12 hours ago and I am still waiting!

I am constantly told that there is nothing that can be done to remove this. So after more  than 7 years of calling the UK every day T-mobile have decided it is not safe!

If they have put this ridiculously stupid and incredibly inconvenient feature on surely they can take it off. Especially as now it is illegal to operate a phone while driving as I can't enter the 2 digits using the car hands free.

T-Mobile obviously can't value their clients by putting processes in place that make absolutely no sense and benefit no one.

A resolution to this would be appreciated and helpful. I am seriously considering taking all 5 of my lines and tablet line to another carrier.

I pay for a package to have unlimited free calls to UK landlines and mobiles and reduced rates to a host of other countries. I don't see  why I should go through the hassle of using Google Voice. When for 7 years I have had no issues.

i am trying to turn this feature off… i have been on the phone for 45 minutes with a rep who has no idea what it is..

Thank you all for posting this. I am running into the exact same issue as the OP on a number I call frequently in France (my father), and it has been driving me crazy. I too have been getting the exact same idiotic responses from Tmobile “support”. It’s nice to hear that I am not alone, and sad to confirm that nobody at Tmobile has the slightest idea about this “feature” or how to turn it off. I have given up on Tmobile because of so many issues with service, and will likely be transitioning to another carrier. I hate to lose their “stateside international” calling feature, but at this point it is probably worth it. 

The first post in this thread is 6 years old, and it is still impossible for users to turn this feature off. This is insane. Good job, T-Mobile! You show how much you care about customer feedback. 🤡