So you're saying it was stolen and then you called T-Mobile, and they shut down the SIM card in the stolen device, now you want to know if there's a way to find it?
If this is what you're asking, I don't think there's anything more you can do, since if the SIM was already shut down, there's no means to contact the device now. And even before if you never loaded an app to help you track it, you'd still not be able to find it.
I do think it would be great if T-Mobile would help more in situations like this. I mean, they do have a means to find a device. Anytime a major crime is committed, we all know law enforcement works with the cell provider of a criminal's cell phone to track them down. Seems they'd do it as a courtesy in cases where you provided a police report of your device being stolen. They could at least offer the last place the SIM reported being on their network. But it seems the carriers don't do much when told a device is stolen. (I hope their lack of involvement is not due to some desire to earn a buck via the victim buying a replacement.)
Of course if more was done to catch petty thieves, they might end up catching someone who has a longer rap sheet than simply stealing a phone.
But, next device you get, be sure to have some software on it to help you in such cases.
One thing I can recommend you doing if you have not already done it. Is look at the activity on your account at https://my.t-mobile.com
See what calls and texts were sent and received after you know the device was stolen. (Keep in mind the times listed on those reports are displayed in Pacific Time.) That could give you a clue who the criminal contacted after stealing the device and who may have contacted them.