No "LTE" icon - Galaxy A9(pro) 6 on T-Mobile (US) network

Hi everyone, this is my first time posting here so please excuse me if this is a repetition or the wrong place.

I recently picked up the Galaxy A9(pro) 6 from Asia (Bangkok) while passing through duty-free. I must say I'm happy with the phone.

However, the "LTE" icon does not show on the status bar of the Galaxy A9(pro) 6. It only shows "4G". I am on with T-Mobile network in the US and my previous phone was Galaxy S4 (also from T-mobile) and it did show the "LTE" icon below "4G" in the status bar. We do get LTE coverage here where I am (my home) as per my previous usage of the Galaxy S4.

The Network mode is set to LTE/3G/2G (auto connect)

Is it that Galaxy A9(pro)6 does not show the "LTE" icon as in, it's not part of the feature?
Are my settings correct or do I need to do something to get LTE?

I don't seem to be having a problem with my data as the speed/performance is pretty good. But I'm not sure if this is just 4G or 4G LTE?

Could anyone help and explain what's going on?

Thank you,

Kevin