I have a factory unlocked iPhone 4s which I bought earlier this year. I have dropped the phone twice but no damage was done to the phone's exterior; still flawless (happened about 4 months ago and 2 months ago). Recently, the iPhone would make a weird tic noise. This is the noise like your home computer processor makes when its under lots of load but the iPhone makes it for barely a sec at it happens randomly. I was downloading a picture today and the sound came. It happened at other occasions too when I don't believe I was even doing something intensive. I believe this noise is coming from some internal parts of the phone rather than the speakers, not 100% sure though. Any solutions? Is my iphone defective because its still under the 1 year warranty? If you do suggest to take it to apple, will apple replace it with a new iphone 4s factory unlocked? The last thing i want is some refurbished iphone.