Only unlocked devices running non carrier specific Firmware versions are eligible. If your handset came from a service provider then it will not be eligible. Have a look at other posts about Beta eligibility and what to look for.
If you look at the service provider software version. The code on the end will have something like EUX. If you go into settings. Down the bottom tap on About Phone Then tap on software information You will see service provider software version Normally last few letters say if its service provider supplied or unlocked manufacturer supplied
Means it was supplied from Vodafone So has Vodafone carrier software installed So unfortunately you will need to wait for the general release of the software