I have an iphone 4 and the screen has started to flicker while it is receiving/ sending data( it is doing it while im typing this). Have tried a restore and that hasn't worked. Would it be best to contact apple directly or go to the store that i bought it from?
Realistically you are going to end up with a refurbished phone, in as new condition. Whether vodafone will give you a loan phone while yours is being scrutinised, is a question you will have to ask vodafone.