I wish I could say the same. I have been using a moto E 2nd LTE on AT&T for 6 months with no issues, LTE works great. I just got 2 new moto G 2015, 16gb, 2g ram versions today in the mail. Tried both, neither will connect to LTE. When in the settings, cellular network settings, prefered network type, I choose LTE(recommended), and as soon as I get out of the menu and go back in, it defaults back to 3g. Both phones do this. I called motorola, they are sending me 2 new replacements. Not sure what the issue is, but pop'ed the micro sim back into the moto E, and LTE comes up right away.
Lewis