Vodafone UK let slip its pricing policies today and Apple's iPhone 4 will be available for pre-order in countries including the US, UK, France, Germany on June 15. O2, Orange and Three will start accepting pre-orders for the iPhone 4 from today. They will soon reveal the pricing details too.

An Engadget Mobile reader managed to grab some screenshots and sent that news website the rate listings, though Vodafone UK's pricing was only up on its site for a short time.

Vodafone's internet data access-allotment for a 24-month contract is different from O2 UK's plans, as it remains at a heavy 1GB even at the lowest $37, 75-minute, 250-text entry-level plan. Until the user steps up to the $88 unlimited minute and text plan, O2's 24-month contract fails to provide 1GB of UK data.

US iPhone users will feel envious and sad to know that a UK Vodafone subscriber will get his or her phone for free if they opt for a 16GB model and subscribe for 24 months at the $66 level, which will offer them 1,200 talk minutes, as well as unlimited texts.

With AT&T, for the iPhone 3GS, an individual has to pay $149 for an 16GB iPhone 3GS, a $36 one-time activation fee, $59.99 for 900 minutes of talk time, $25 for the 2GB DataPro internet-access plan, and $20 more for unlimited texting.