IPhone won't sync with iTunes? - 1

Every time i plug in my iphone 4 to the computer, all it does is charge it, but won't sync. Not even the name "emma's phone" will show up on the left sidebar of itunes like its suppose to.everything i bought on my phone automatically goes to the computer with itunes, but if i delete something, since iphone won't connect, i can't put previous song purchases or apps onto my phone. My mom's iphone will connect with itunes, so will my sisters ipod. But not mine. WHY! This is frustrating.

I don't really know why that happen but try these:

1. Restart you phone
2. Restart your laptop.
3. Try a different usb port (usually helps for me)

If you know you have a back up of you phone on iTunes or iCloud the Google put your phone in recovery mode (instructions below) then you'll be able to factory reset it then restore your content.

To put your phone in Recovery mode:

1.Open iTunes and connect the iPhone to your Mac.
2.Press and hold the Home button and the Sleep/Wake button at the same time.
3. As soon as the screen goes black release the Sleep/Wake button. Continue holding the home button until you iTunes pops up a message telling you that it has detected an iPhone in recovery mode.

Then restore you phone.