I have a brand new Google Nexus 7 (2013) LTE tablet and failed or enabling LTE on it.
I had two cards (microSIM for Nexus and nanoSIM for iPad Mini) from the very same LTE-enabled local (Poland) carrier Aero2. Both are inserted to respectful devices, both devices are in the same place (same network coverage) and iPad Mini catches LTE signal (and its amazing speed) with no problems, while my Nexus falls back to HSPA+ at most, only sometimes uses 3G and never runs on LTE.
Is there any extra switch on this particular device or Android system (was on iPad Mini) to enable LTE?
EDIT: Of course, I followed step-by-step guide on this subject available at Google Nexus Help.