What exactly is an 'ultimate price promise voucher'?

[Hudzilla]

With the pretty much confirmed iPhone £100 drop around the corner, people who bought an iphone inside a month ago are promised this voucher', but what can you do with it? Do you have to spend it in an o2 store or can you spend it on other apple products? How long will it be valid for etc...

If anyone has had one before, what's your experience with it?

 

[Hudzilla]

Just been on the phone with o2, apparently the rumors of getting a £100 voucher, if you purchased an iPhone in the last month are false, its only in your 14 day return period.