I clicked reboot not my iphone wont turn back on what do i do????

take it back for a warranty exchange unit

You need a full system restore, plug into itunes and click restore, apple will guide you through the rest. This will delete all data but it will sync it back to the last time that you synced your iphone.

go into DFU mode or reboot mode.
http://www.edepot.com/iphone.html
Click on the Super Secrets section. Shows you everything you need to get back.

When the device is locked up like this hold down the lock and home buttons. After a few seconds the device will turn off, immediately let go of both buttons. Now press down and hold the home button. Hit the power/lock button one time. Continue holding the home button until the phone boots up. It will need to be connected to iTunes for recovery at this point.

You can reset it:
go into DFU mode or reboot mode.
http://www.edepot.com/iphone.html
Click on the Super Secrets section. Shows you everything you need to get back.

hi if your iphone is recognised by your itunes then click on the ipod screen and restore it or try pressing the power button and home button at the same time, hold them wait till the apple logo comes on and it should reboot, good luck

Open itunes. with your phone off hold home button and plug phone into computer and hold until itunes sees the phone. You can restore then. The phone will be in dfu mode. If that doesn't do it connect the phone hold home and power for 6 secs. then release the power button while holding the home until itunes sees phone. Restore and use your phone again...

Try using another cable or charger. A damaged charger or cable could cause it not to charge. 
Otherwise, contact apple or apple store for repair.

Put iphone into DFU mode. you can do it by iphone software or handy. then restore it by itune (NOTE. delete itune folder in your Mymusic forder (in the my document) itune will make a new one when you open it again )if you get error .open ibricker to get out of recovery mode.

Hi. My 2G iphone was connected to Itunes and it was accidently disconnected...now the screen is showing a UBB cord with an arrow pointing towards the Itunes logo. can you help?