We now have a good idea as to which wireless operators in the U.K. that will stock Samsung's Galaxy S IV. Three and EE (Orange/T-Mobile) recently launched Web sites that allow potential customers to enter their contact information for news on Samsung's new flagship, clearly indicating that the phone will launch on those networks when it's available.

"Register your interest now and we'll make sure you're one of the first to hear all about it, and how you can get yours," Three's site says. "A Samsung Galaxy is coming soon on EE, Orange and T-Mobile," EE's states.

We don't know when the phone will be available, or how much it's going to cost, although Samsung will no doubt reveal that information during its global press conference tomorrow. The phone is expected to feature a 4.99-inch display, at least a quad-core processor, 2GB of RAM, Android Jelly Bean and plenty of new software features.