Apple has started allowing users to pre-order its latest iPhone ahead of its release next week.
The sim-free cost of the device will be £499 for the 16GB model and £599 for the 32GB.
Network providers O2, Vodafone and Orange have yet to unveil their tariffs for the phone, which goes on sale on June 24.
iPhone 4 is 24% thinner than its predecessor, and includes an enhanced display and stainless steel case.
The phone also has two cameras - one on the front and one on the back - and will allow users to chat via video over wifi.
Earlier this month, Apple CEO Steve Jobs said the phone was the “biggest leap” since the release of the original iPhone in 2007.