GS4 Sprint Spark Question

[Melaza]

I know the GS4 is not listed as Spark ready phone, but my question is aren't the 2 other bands consist of 26 & 41? My GS4 shows both enabled

 

[styx_phoenix]

If you tap on either one of them in view mode, you would see that they are not set so therefore are not enabled. If you enable them in edit mode, you will notice your signal drops completely and then eventually comes back after it resets the two flags to "< not set >". There is a rumor/leak of a new tri-band version of the S4 with the model number of SPH-720T but it has not been officially confirmed yet.