For those wanting an iphone 4, vodafone UK are offering a few plans ranging from £25 per month, which includes 75 talk minutes, 250 texts, 500mb of Data. However if you travel in Europe a lot the £40 plan maybe for you, as it offers 900 minutes, Unlimited texts , 750 MB mobile internet data, Includes 1GB wi-fi with BT Openzone. 5MB of Euro data roaming per day. for more information check the Vodafone UK iphone 4 website:

iPhone 4 on Vodafone - order the new iPhone 4 mobile phone today

on £25 a month handset is £219
on £30 a month handset is £169
on £45 a month handset is £119
on £40 a month handset is £89
on £45 a month handset is £29
on £60 a month handset is Free

prefer pay as you go? then vodafone offer iphone pay as you go deals too: iPhone from Vodafone - iPhone on Pay as you go

for those wanting to compare the iPhone 4 with the iPhone 3GS here's a link: iPhone from Vodafone - Compare iPhone 4 and iPhone 3GS