At some point my Samsung galaxy3 phone would display 4G on it. For the last month or so it only displays 3G. IS this a known problem and are there any solutions?

Is anyone else experiencing the same issue? I've reset the phone, removed the battery, etc. and can't get the 4G signal to display. Only showing 3G even when I know there is 4G available

Kinquana -
Definitely see a difference with data.
My wife has a Samsung Galaxy Note 4 that displays 4g service >99.5% all of
the time.
Her access to the internet is much quicker than mine.
Based on what I'm seeing, I'm wondering even if my phone is setup for 4G.
Checked my Mobile networks setting vs what see has on her phone and they are
exactly the same.
Only thing different is in the APN type:
Note 4 - default,dun,supl
Galaxy SIII- default,dun (appears that I can't change this)
Her signal strength is (-101dBm 39asu) vs mine (-85dBm 2 asu)
Ken

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