Carrier Vodafone UK has accidentally leaked subscription plans for the iPhone 4, which is set to go on sale in the region on June 24th. Most notable in the information is the existence of universal 1GB cellular data cap; while low, the cap is less restrictive than options at O2, which require people to pay at least £60 per month if they want 1GB by default. At Vodafone a 1GB cap also exists on traffic at BT Openzone Wi-Fi hotspots.