First photo is an image from the original FCC certification application for KT (featured
here). Presumably circa June 2011 when the application was logged after being filed w/ FCC.
The second photo is from the Japanese blog site mentioned above. The post is dated 20/07/2012. Both photos show a device with iMX507 CPU.
Its immediately obvious however that the circuit board has undergone some significant modifications. Fewer ICs and soldered storage memory has been replaced by a socketed microSD. In addition, the steel shielding around the primary chipset on the original model appears to have been discarded.