Sent from my SGH-M919 using xda app-developers app
As far as I know, flashing modems hasn't worked via mobile odin for quite awhile and I can confirm that it still doesn't work with the new update. For some reason, on the mobile version, flashing a modem doesn't stick. I don't know the exact technicalities behind it(because I'm not a big techie) but yeah, it doesn't stick. Your only option is to use odin via PC. I know and confirm this because I attempted to flash modems via paid mobile odin several times and with this new update, it still doesn't work. Hope this answered your question bud.