International Roaming - Not connecting

Yes, I've enabled data roaming. It shows in my "cellular tab" that "no data" has been used. It's crazy since my wife's phone works just fine on the same plan, etc. It's honestly as though something associated with my number has roaming blocked or not enabled; I've been to an Apple store and a local cell phone store; they've tried the SIM card, etc. and it works in their device. They've also tried every setting, etc. Yes, we were on with TMobile technical support for almost an hour today; he tried reset, and all kinds of things, etc. Tried adding some random plan (my wife is on same plan and her phone is fine for data roaming). It's hard because I can't even use Whats App or GPS away from a wifi router. Tech support said they'd issue "a ticket" and get back with me but nothing yet.