Download the zip file above and place in on your Sprint Galaxy Note II external SD. Then using custom recovery (TWRP or CWM are fine) tap install. Navigate to the file and install the zip. Reboot and enjoy. It an take a day or two for new modems to fully get seated so don't be too hasty to judge. Rebooting a few times will help it seat. If you want to check to be sure if you've got it installed correctly just go to your device menu>sytem settings>about device>Look at your baseband...It will look like this:
As with any mod to your device, making changes can void your warranty, may function differently for each person based on a variety of factors, and could cause damage to your device. Please follow the proper procedures and make a Nandroid backup before attempting any such mods. It is also advisable to have a copy of your current modem on your sd card just in case you need to flash back but don't have an internet connection to rely on at the time. Be aware that I am not responsible for any damage to your device. Mod at your own risk.