yeah it is easy if u use the file i give u the numbers will be displayed as follows 1234567890 with no - or ()
http://r a p i d s h a r e.com/files/92018433/Phone_Number_Format.zip WITHOUT THE SPACES
first make a backup of the file before replacing it
go to the following and replace the file with the given one.... make sure u reboot iphone.
in phoneformats replace UIPhoneFormats.plist with the given one
restart ur iphone and good luck