Yeah, sorry about that, Galaxy S5 is what I meant. Yes, the CDMA/LTE option was checked. I tried updating the profile and PRL while at home in the suburbs with no luck. I just called Sprint tech support and they had me do it again now that I'm at work in the middle of downtown. She also did some kind of line re-provisioning from her end, and all of a sudden it seems like the issue is fixed. The Spark icon has shown up for the first time ever, and is fluctuating between one bar and nearly full bars. Haven't seen the 3G icon since. Ran Speedtest before my call and got .4 mbps up and .16 down on 3G. After the call, I peaked at 22+ mbps down and 1.5 up. Signifcant difference and what I had been hoping for all along.
Happy now.