My wifi decided to stop working on my iphone 4s, googled it and was told to do any software updates.. during the update my phone turned off and when it came back on it was stuck on a pic of the iTunes logo and lead... its now unrecognisable on iTunes and ive followed a few youtube vids to try and restore it, my laptop makes the sound when I plug the iphone into it but iTunes wont pick it up.... any ideas?? Thanks!