As reported earlier, Apple will hold an iPhone 4 press-conference on Friday. The event will most likely address the antenna controversy surrounding the iPhone 4.
In the meantime Apple iPhone developers already got access to the iOS 4.1 beta release that includes the announced signal bar changes.
According to MacRumors there are additional improvements in iOS 4.1 including redesigned game center beta, favorites for FaceTime and off option for spell check.
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