Call us skeptical (about the specs), but this is what IntoMobile has to say:

According to a report citing comments from South Korea’s KT execs, Apple’s upcoming iPhone successor could feature a removable battery, OLED display, video calling, and a new dual-core processor alongside upgraded graphics processing hardware. If true, we could see this feature-packed “iPhone 4G,” as it’s being called, hitting market as soon as April of this year. The expedited launch window would be a departure from Apple’s traditional mid-year launch of new iPhone hardware.

And what might we see in April?

The rumored feature-set of the iPhone 4G is everything we’d hoped for in a next-gen iPhone. The higher-resolution OLED display should go a long way in competing with smartphones outfitted with 3.7-inch and 4-inch high-res displays from the likes of HTC and Motorola. The removable battery is something that iPhone users have been clamoring for ever since the original iPhone landed on US shores – an Apple patent application bodes well for a removable battery. And, while supposed Android “superphones” like the Nexus One tout 1Ghz Snapdragon processors, this new iPhone 4G might just come to market toting a latest generation of ARM Cortex A9 dual-core processor capable of clock speeds in excess of 2Ghz. That’s going to make for an iPhone that’s not just fast, it’ll have more processing power than laptops of just a handful of years ago!

Sounds exciting, but, alas, unlikely.