I know Apple usually stick to June for their iPhone launches, but according to an article over on unthinkable, Apple just might launch the next generation iPhone sometime in April in a few select markets.

Rumour has it that Apple will split from tradition and possibly push out the fourth iPhone in early April and could indicate that Apple can no longer rely on a single announcement per year to keep pace with rival smartphone makers.

The rumour of an April iPhone originates from Korea where operators SKT and KT are only just launching the iPhone 3GS and have said that the iPhone is “no big deal” where Korean mobile web users are concerned.

Apparently Apple may have responded to this by striking a deal to deliver an upgraded iPhone at the earliest possible date. Furthermore the article states that Fast Company says that although Korea and a few select markets may see the iPhone in April, the majority of the mobile arena will have to wait until June.