Originally Posted by PyroSporker
The Galaxy SII was a Wimax (4G) handset. The HTC One is an LTE (4G) Device. The two networks, while both 4G, operate in different ways and are received on Sprint handsets differently.
On the SII, you could have left the 4G radio on all the time, and the phone would have switched over to Wimax when the signal was detected. (not exactly recommended for battery savings)
On the One you can set the phone to browse on CDMA 3G network only and manually turn on 4G LTE whenever you want to, just like the toggle on the SII.
I already knew all of this but thanks for the response anyway