desconozco el modelo que tienen en vodafone pero si es modelo LTE podrias verificar esto ya q no se a probado en otros modelos.
Requirements: Galaxy Note 2 LTE Version (It may also work on GT-N7100 models, but its not generally tested)
How to unlock Galaxy Note 2 with the hidden menu:
Dial *#197328640#
Go to Main Menu > [1] UMTS > [1] Debug Screen > [8] Phone Control > [6] Network Lock > Options [3]Perso SHA256 OFF
Wait 30 seconds
Press Menu and Back (This will take you back to [6] Network Lock
Choose [4] NW Lock NV Data INITIALLIZ
Wait 1 minute
Reboot
This should have unlocked you Galaxy Note 2
Thanks to XDA user owl74 for this info!