Bloqueo internacional

By  call 611 , I requested to activate international call blocking for all my lines. Few minutes later I can see all my line has feature international blocking add on.

Plus, I activate charged roaming feature as well.

My brother is travelling in Europe ( which include 215 Countries ) does not get signal data roaming at all.  

I call support multiple times, and they said " make sure roaming is on" " turn off and off" , " everything clear just wait ". No luck 

And finally one of them told me “ I need to turn off your  International  call blocking add on “. 

As soon as he disables, my brother send me a message got LTE signal  and data works as it should.

My understanding the ILD (International long distance) blocking is to avoid making international calls and texting to overseas as explained on Tmobile  support article as follow:

https://www.t-mobile.com/support/coverage/stateside-international-calling-and-texting-services#:~:text=We%20offer%20the%20ability%20to,us%20by%20message%20or%20social.

But not to block the data roaming on 215 Countries list. 

Why that ILD add on block the data roaming as well? 

My friend assures me “ My tmobile account have ILD  block  add on , but have never problem  with data roaming in overseas “

Tech support said “ once you turn on ILD  block add on , you never get  roaming data in overseas“

Please advise, I just want to prevent to call / texting overseas, but need data roaming as 215 Countries list .

I fully understand as explained on above article “This service can't block outgoing international calls if you are roaming domestically on another carrier's network” . 

Gracias