My EU nvidia shield LTE cant see EU LTE networks topic

My nvidia shield cant get 4g network where my phone does, at first I tought it might be a network problem or SIM problem so i swapped the phone and tablet simcards without any improvement. My oppo find7 can access 4g with both simcards and the nvidia shield with neither of them.

Its the EU model so it should work here, according to the specs it supports all the LTE bands available in spain

¿Does anyone know what could be the problem? ¿ Anyone got 4g properly working?

I am on latest 5.0.1 update.