Drumbeat continues for iPhone 4 recall

Calls for an Apple iPhone 4 recall are getting louder in advance of a press conference Apple announced for Friday -- cryptically revealing that it will be about the iPhone but giving no other details.

Since its release in June, the iPhone 4 has been plagued with complaints and a class-action lawsuit over its reception and antenna issues. Apple issued an apology over a software glitch that overstates the iPhone's signal strength, which you can read about on WalletPop.