i bought an iphone 3gs on ebay and used it for a while on o2. i was having problems so decided to restore the iphone. now i cant set the iphone up i can only set it up as far as the wifi set up and it then says it cant activate the iphone. I rang o2 as i thought maybe the phone was locked to another network but o2 assured me that it was locked to o2 originally. I am lost now?? can anyone help??