iphone 4 16gb o2 slighlty fault please read +

iphone 4 16gb on o2 network in good condition no scratch on screen view days ago i droped the phone and since them i lost my signal everything still shows up like carrier and 3g...but i do have no signal anymore i just bought new phone now and no dont need it anymore i think its just the antena or so and this can be easy fixed..... comes with charger,usb and headphones no paypal cheers