mobile

Dear all,
I followed all the steps on the tutorial:
http://forum.xda-developers.com/gala...ds-to-t2886059
but still dont have the LTE bands.
problemas:
1 - when I set, USB to CP, the computer does not connect to the phone.
2 - when I open QPST, I dont see any port as DIAGNOSTIC. (alredy try reinstalling the drivers)
3 - on QPST, I can read from phone, but after editing NV 6828 and 6829, I cant write values to phont, I get the error message: "serious error encountered write to phone aborted"
4 - when I reboot the phone and reconect to QXDM, the values I setted on 6828 & 6829, are still there, but I don't have the bands.
does anyone know what is missing?
thenks a lot
regards
MGdAvila