We know Apple will announce the iPhone 4S tomorrow at media event. But how much will it cost? Apple will introduce the 64GB and unlocked iPhone 4S for $299 (current iPhone 4 32GB price) and the 16GB version will be available for $199, 9to5mac reported. According to its sources the current 8GB 3GS that AT&T offers for $49 will be replaced by a 8GB iPhone 4. The release date for these devices will be on October 14.