O2 in the United Kingdom has announced that it will begin offering the iPhone 3G to Pay & Go pre-pay customers on September 16. The 8GB iPhone 3G for Pay & Go will be available for £350 (~$625) and the 16GB model for £400 ($715), both of which will include one full year of unlimited data and Wi-Fi throughout the UK. At the end of the 12 months users can continue to receive unlimited browsing and Wi-Fi for £10 (~$18) per month. Unfortunately, Pay & Go customers will not be able to use the iPhone’s Visual Voicemail feature or call merging. In June, O2 revealed its expected pricing for Pay & Go iPhone 3G units, and had both models selling for between £40 and £50 less, but with only 6 months of included data and Wi-Fi.