Apple has announced iPhone 4S, but nothing about the much anticipated . Is it worth to go for an iPhone 4S. If you are going to buy a new iPhone, then definitly you should go for the iPhone 4S, but if you are an iPhone 4 user, should you upgrade? I do not see much reason to do that, instead I would wait for the iPhone 5.
Difference / Comparison between iPhone 4 and iPhone 4S
The major difference is the processor, camera, bit a better battery life. You need to decide, if you need to go for an upgrade or wait for the iPhone 5, which could have a different size, weight, thinner, wider screen, etc.