O2 and Orange have given all the information related to upgrade, tariffs and handset costs for the new iPhone 4. But if you do not intend to commit to an agreement, there are other options as well.

The Apple iPhone 4 goes on sale coming Thursday. The name is of the suggestion that the fourth-generation iPhone and gadget fans will have made notice of something of a pattern, rising in terms of the launch date of Apple's flagship smartphone.

Apple conventionally makes use of its yearly summer developer affair, WWDC, to boast its newest iPhone. In 2007, Steve Jobs bragged about the original iPhone; in 2008, Apple unwrapped the iPhone 3G; in the preceding year, where it was seen introducing the iPhone 3GS; and just more than a week ago, Steve Jobs proudly launched the iPhone 4.

Unluckily, the offers made by network operators do not seem to reckon with this release cycle. Vodafone, O2 and Orange are only offering iPhone 4 customers an option of 18-month or two-year bonds.

So, for a number of people, a SIM-only deal might be the way to advance; this means you purchase an unlocked iPhone, and register to a pay-as-you-go SIM deal from one of those three operators.