[Q] Galaxy Note4 smn910c - Status bar not showing 4G LTE topic

Hi,
I am using Galaxy Note4 smn910c with carrier Simple Mobile. Status bar never shows $G LTE rather it only shows 4G.
My phone is LTE capable. ANy idea why is it not showing LTE on status bar. I have tried with t-mbile sim also and same thing happends. No LTE.
Please suggest.