Good Day All, I was updating and installing to iOS4 when my iphone 3G suddenly says it can't read my sim card and was locked. On my iTunes screen I was told I needed to insert a SIM card in order to continue with the installation of the iOS4. I used my friend's SIM card and my iphone was able to detect it however my itunes would only allow me to the option to restore my iphone which i did and now all my camera roll, notes, contacts and sms are gone and the backups in my iTunes are all post-iPhone-crash. please help. these contacts are very important for me.