http://forum.vodafone.co.uk/t5/About-the-Community-and-Latest/Advanced-Upgrades/td-p/982161"Further to the message above, as of 20th February:
We have taken the decision to reduce the period within which a customer can upgrade, to within 50 days of the end of their contract. We still offer one of the most competitive free early upgrade options available for customers.
These changes do not affect the length of the contract a customer has committed to. Any period left on an existing contract is accounted for before the customer’s new contract period starts.
This means that regardless of the period in which a customer can upgrade their phone, the contract length is not affected. The change does, however, mean customers will have to wait a couple more weeks before getting their next handset, so we have tried to introduce this change at a time which is traditionally relatively quiet in terms of new handset launches.
This change takes effect from February 20 across our retail and online channels and March 12 through customer services.
We will honour upgrades for those customers that were notified of their upgrade date ahead of any changes that we have made."
END.