Apple broke the rules last year when it came to launching new products. They released two new versions of iPad and also an iPad Mini. iPhone 5 was expected though but it is being predicted very strongly that Apple may broke the same rule again this year. So iPhone 5S or iPhone 6 may be coming well before the summer.
You never know with Apple but recently leaked pictures suggest that it is iPhone 6. There are considerable design changes in it and observing it closely suggest that Icon layout is changed as well. The pictures seem to suggest that it looks similar to Sony Xperia android smart phone.
Everything you ever see about Apple and source is not Apple itself then the its better to consider it as a rumor and nothing else. I remember the rumors about iPhone 5 having total transparent glass body and we all know by now that iPhone 5 has less glassed body then any other iPhone. But last year a lot changed and iPad Mini was exactly what it was rumored to be.
These pictures are published by Ciccarese Design on their website and they have compiled a video of them as well. Try some proxy if you are from Pakistan as video is on YouTube.