hi everyone i've an iphone 3GS with ios firmware 4.0 its unjailbroken
the problem is in my country they added a number in the numbers of the phones and from that moment the caller id in the sms shows no names although they are saved in my contacts , it shows only there international numbers
i need the help please from any body
and thanks in advance

Do a search on the forum for the caller id fix for international users. There is a current fix for everything up to 5.0 to fix the caller ID formatting.