4G LTE Band 41 Can be Enabled

Tried the ##DATA# on my Lumia 950XL and it gave me an error. I have the Single SIM International RM-1085 variant of the 950XL and I'm on USA T-Mobile. It actually looks like it tries to gather up the field data, but then pops up an error message. Oh well.

I use the same model on AT&T, and ##DATA# doesn't work for me either. There's a workaround though. Connect a Bluetooth device and open the Gadgets app. Then use the app to have the Bluetooth device open Field Test upon connecting. Disconnect then reconnect the Bluetooth device, and it should open right up.

Hope that works for you!
 
Try this... Download the old MS app folder app from the 8.1 days. Open it, create a folder and then you should be able to scroll through your app list to add apps to the folder. If you go down to the F listings, you should see FieldMedic. Try and see if this lets you access it this way...
 
Try this... Download the old MS app folder app from the 8.1 days. Open it, create a folder and then you should be able to scroll through your app list to add apps to the folder. If you go down to the F listings, you should see FieldMedic. Try and see if this lets you access it this way...

This worked!! Awesome! Thank you! Sure enough LTE Band 41 was unchecked. I checked it and saved it. Doubt it really makes any difference.