I have tried the guide on my Samsung Galaxy Tab S 10.5 LTE (Sprint).
I could wirte the NV_RF_BC_CONFIG_I (#1877) value in RV_NV_Manager.exe but my problem is:
When I'm in mzTool selecting my WCDMA bands (I can't see LTE bands, just GMS/UTMS/WLAN, etc), there are other 3 values that are being modified:
I can see the NV_BAND_PREF_I (#441) in RV_NV_Manager.exe and modify it like the #1877 but there is not present NV_BAND_PREF_16_31_I (#946) nor NV_BAND_PREF_32_63_I (#2954) then I can not write it values.
There is not #6828 nor #6829 (LTE preferences) parameters either but I can see LTE config, settings and more for this carrier under Hidden Menu...
Am I missing something??