hi i got an iphone 4 yesterday and i am having trouble finding wifi spots. i went to a shopping center today and it had around 10 different wifi spots and i could only see one. my 3 other friends has iphones (two have 3gs on has 4) and they could see and connect to them all fine. this is happening everywhere also i cant even see my home network unless i am standing right next to the router where as the other iphones can pick it up from upstairs or in the garden. is there anything i can do to change this like restoring or anything else? or is it faulty?