Apple fans still rocking the iPhone 3G and 3GS who were fast to grab up the new iOS 4 operating system when it was made available for the smartphones were also the first to realize the new OS has some issues on older handsets. The WSJ reports that Apple is currently probing reported issues with iOS 4 on the iPhone 3G.
We haven't heard as much about the iPhone 3G and 3GS issues with the OS update as we might have if the antenna issues on the new iPhone 4 had not been so prominent in the news. The biggest complaint from users who have installed the OS on the older iPhones is that the phones are sluggish after the install.
The iOS 4 Beta 2 software that was made available to devs this week is said to fix some of that sluggish operating on older iPhones. The WSJ offers no official word on when/if Apple will be offering up insights on what it finds. For now if you haven't upgraded to the current OS you should probably hold off.